On full-load long trips, the Wey Gaoshan 8's floor performance overall passes muster. The aluminum full-cabin hard flooring is more stable under high temperatures, but with a full load you should still pay special attention to the middle-row trim covers and edge-sealing finish. For cross-city commuting to first-tier cities with two kids and luggage, you also need to check whether the area around the rails is uncomfortable underfoot and whether cleaning is easy.
On Full-Load Long Trips, the Floor Fears Three Types of Failure
When a two-kid family takes child safety seats, a stroller, and several pieces of luggage onto the highway, for a removable-seat, full-cabin aluminum floor the weight presses on the various fixing points for extended periods. Whether aluminum hard flooring passes isn't about how flat it is right after installation, but whether the locks, trim covers, and edge seals stay stable after load and high temperature combine. The problems concentrate in three areas.
The first is localized loosening. If a lock doesn't fully engage, or a middle-row trim cover presses on a panel edge, play can develop after a few dozen kilometers. Over speed bumps, rear passengers may hear a clicking sound, and in curves their bodies may shift slightly; with more luggage and heavier loads, the looseness becomes even greater.
The second is thermal-expansion misalignment. After high-temperature sun exposure, cabin temperatures can exceed 60℃, and the aluminum panels, hidden rails, and middle-row trim covers change dimensions at different rates when heated. Flatness alone isn't enough — if gaps appear around trim covers, sustained driving can cause foot-catching and rattles, and after repeated hot-cold cycles this should never be considered normal.
The third is edge lifting. If the edge trim strips near the door side or seat rails are pressed unevenly, at first it's only visually uneven; but with frequent boarding in first-tier-city commuting, shoe-scuffing plus full-load vibration makes lifted edges increasingly obvious. At highway speeds, exposed gaps are uncomfortable underfoot and can let small debris get under the panels.
Why Hot-Weather Commuting Puts Aluminum Hard Flooring to a Harder Test
The difficulty of hot-weather commuting in first-tier cities isn't a single bout of sun exposure, but the cabin repeatedly undergoing heating, sunshine, and rapid air-conditioning cooldown every workday. Aluminum conducts heat quickly, so the floor below the side windows heats up noticeably — even with the A/C on after sun exposure, the floor still feels hot underfoot. The panels, clips, and edge-seal joints also endure continuous expansion and contraction; with full-load weight on top, loosening shows up earlier than usual.
The Wey Gaoshan 8 is an MPV with frequent rear-row entry and exit. After full-cabin flooring is laid, the areas around the middle-row trim covers and the hidden rail finishes are exactly where shoes and luggage repeatedly pass. When rushing with kids, folding strollers, snacks, and water bottles get moved along the way; if rails collect dust after seat removal or trim-cover edges aren't seated flat, snagging and rattles are more likely under high temperatures. The load-bearing panels use 6061 pure aluminum, dimensionally stable and resistant to heat softening, but seam sealing, lock preload, and trim-cover tolerances still determine durability.
Inspection shouldn't only check whether the surface is hot to the touch: with a full load parked until mid-afternoon, step over the front cabin, middle rows, and rear cabin in sequence, open and close each trim cover three times, press locks fully down, then use a 1mm feeler gauge on the edge-seal joints. The real test for aluminum hard flooring is staying flat and locked after thermal expansion, with no rattles under full load.
Is the Full-Cabin Flooring Truly Seated Flat?
Full-cabin flooring isn't about having a large enough area, but whether the sills, hidden rails, middle-row trim covers, and side finishes share a single datum plane. On the Wey Gaoshan 8, after reinstalling each row of seats, trim covers must not sit above the aisle floor, and hidden rail covers must not leave a step underfoot. At acceptance, slide a 300mm straightedge across these positions in sequence, then check seams with a feeler gauge; note any hollow spots, lifted edges, or left-right height differences before examining the locks.
In high heat, guard especially against aluminum panel "bulging." Aluminum expands and contracts with temperature; if modules are rigidly squeezed in place, seams may arch after sun exposure. A proper full-cabin solution must leave reasonable expansion clearance between panel surfaces, joints, and edge seals, and fixings must hold firmly rather than relying on adjacent trim covers squeezing each other. After high-temperature sun exposure and 20 minutes parked, pull the hidden rails again, step on the sills and trim covers, feel with your palm whether joints continuously push against your foot, and check whether lock positions have loosened or rattle.
Finally, you must verify with the load on board. With occupants seated, push the usual suitcases in from the sill and walk the middle-row aisle back and forth twice. If the wheels feel bouncy, the trim covers lift, or the locks spring back, it means the gaps were merely covered, not truly flattened; these small undulations aren't obvious normally, but a full load magnifies them underfoot and through luggage.
Checking the Middle-Row Trim Covers and Hidden Rails on Delivery Day
On delivery day don't just check whether surfaces are flat — the middle-row trim covers and hidden rails are the focus before departing fully loaded. First slide the second-row seats through their full travel front to back, observing whether the trim cover and aluminum panel seams are flush; after locking, there should be no lifted edges. Then use the factory locking mechanism to unlock and lock repeatedly, confirming no snagging, rattling, or interference with the floor. When rushing to the high-speed rail with elderly passengers and children, what matters most with frequent seat adjustments is avoiding sudden loosening — test each position one by one before delivery.
Open the middle-row trim covers and check the hidden rail grooves for aluminum shavings, grit, and leftover adhesive; the rails should run smoothly. After high-temperature sun exposure the cabin heats quickly and aluminum panels undergo slight thermal expansion and contraction, so trim covers must not be rigidly jammed tight, nor leave an obvious step. After reinstalling, run a finger lightly along the seams — a continuous feel means proper seating; don't sand or enlarge holes yourself, to avoid ruining fit precision.
Finally raise and fold the third row, reconnect the second row, and test one full-capacity entry and exit. When adults board, shoe soles and suitcase wheels may strike the edge trim strips — the strips must not loosen, and trim covers must not be pushed up by seat bases. Photograph everything after the full inspection and have the delivery form note rail operation, trim-cover seating, and fastening condition.
What Sets Edge Trim Strips Apart Is the Finishing
Edge sealing may look like mere finishing, but what really matters for full-load long trips is whether the edges can disperse stress in the aluminum panels. At the junctions of the Wey Gaoshan 8's middle-row rails, sills, and trim covers, if gaps collide hard directly, then after installing child seats and loading luggage, repeated seat sliding keeps loading the panel edges, making warping and rattles more likely after heat exposure. The right approach is cutting edges to the actual contour and pressing them with elastic trim strips, so panels sit flush while retaining the necessary thermal-expansion allowance.
The differences among trim strips mainly lie in cross-section, clip slots, and fixing method. Thin, narrow strips merely "cover" the edge and tend to float over sill curves; wide cross-sections with continuous clip slots can follow the doorway and trim-cover lines. At hidden rail openings they must also clear the locking mechanism — they can't be pressed flush at the cost of the rail covers or seat locking. Around the middle-row trim covers there should be an inspectable seam: smooth to the touch, with no wavy edges visible to the eye.
At delivery acceptance, don't judge by color alone. Slide the second-row seats back and forth several times, then fill the seats and load bulky luggage, watching for lifting, bulging, or clicking near the sills and rails. In hot weather, let the car sit for two hours first, then check whether the trim strips have come loose. A truly proper finish should remain re-verifiable after seat removal and installation, stay quiet under full load, and sit flush with the original carpet without pressing on any functional components.
Recheck the Full-Load Condition in Three Steps Before Departure
Before departure, don't rush people into the car — first fully restore all structures that were removed and reinstalled. After reinstalling seats according to the family's actual headcount, press each middle-row trim cover down one by one, confirming the covers sit flush with the aluminum panels and lock in place. No lifted edges around the hidden rail access openings, and screw heads must not protrude above the finished surface. Run your palm along the seams between covers and panels, then gently push the covers — address any obvious wobble or rattling first, rather than hoping a full load's weight will press it secure.
Second, load people and luggage as for a real trip — don't just do an empty-vehicle check. With the seat rails fully locked, seat second- and third-row occupants separately, applying repeated pressure with soles and suitcases, feeling whether the aluminum panels sink, rock, or produce persistent clunking. A hollow sound underfoot usually means the support points or fasteners under the panels need rechecking — don't mask it with luggage weight.
Third, drive slowly around the parking lot for 30 meters, doing two light brakes and one continuous turn, then get out and inspect the sill edge trim, finishing strips, and trim-cover edges. For a vehicle that has been heat-soaked in the sun, also watch the expansion joints: their width should stay uniform, with one end neither jammed shut while the other gapes open. Recheck after 10 minutes parked; only once the full-load state shows no looseness and no abnormal sounds should you plan the highway trip.
Frequently Asked Questions
Q1: On full-load long trips, will the Wey Gaoshan 8's aluminum full-cabin hard flooring develop lifted edges or rattles?
The probability of passing is fairly high. Full-load long-trip vibration and loads continuously test the fixing points and seams, but as long as the aluminum full-cabin hard flooring is installed to spec with screws tightened, lifted edges or persistent rattles are unlikely in normal use. If localized knocking occurs, check whether the rails, trim covers, and fasteners have loosened rather than immediately concluding structural deformation.
Q2: With a child safety seat, the grandparents' luggage, and a stroller all in the car, will floor seams get in the way?
Generally not noticeably. If the seams and hidden rails are flush or recessed, even with the stroller and luggage taking up space there's still basic foot room; the elderly passengers' luggage should be secured toward the front to avoid encroaching on third-row foot space. When several people board at once, confirm the rail covers are locked before placing items, to reduce the risk of catching feet or squeezing the seams.
Q3: After high-temperature sun exposure, will the flooring seams, edge trim, and finishes come loose?
They usually won't loosen, but high heat magnifies materials' thermal expansion and contraction. If the aluminum full-cabin hard flooring's seams, edge trim, and finishes are firmly fixed with continuous adhesive lines, slight expansion after sun exposure is normal. But if they can be pressed and rocked, edges separate, or there are rattles, that is not normal — return to the shop to check fastening and sealing, rather than continuing to use the vehicle and mask the problem.
Q4: After removing and reinstalling the middle-row trim covers, are scratches near the hidden rails normal?
Not normal — you must distinguish minor surface scratches from structural damage. If tools touch near the hidden rails while removing the middle-row trim covers, shallow surface marks may result, but there should be no nicks, deformation, or paint chipping on the rails. Minor scratches can be cosmetically treated; if base material is exposed, there are burrs, or rail closure is affected, photograph it as evidence and return to the shop to check installation and assembly clearances.
Q5: With a plug-in hybrid at low battery under full-load hard acceleration, will rear luggage slide along the floor?
There is a sliding risk — you cannot conclude it won't slide just from the aluminum full-cabin hard flooring material. With a plug-in hybrid at low battery under full-load hard acceleration, rear inertia increases; if luggage isn't secured, it may lurch along the seams or rails. Before a long trip, use cargo nets, straps, or compartment dividers to hold heavy items down, lock the stroller and suitcases separately, and confirm nothing presses against the trim covers.
The Four Most Common Pitfalls When Installing Flooring
Subheading: Get clarity on what "non-destructive" means. What sellers call "non-destructive" usually means minimal disassembly and no adhesive; owners understand it as leaving the factory wiring harness, seat structure, and mounting holes untouched. In actual deliveries, removing middle-row seats, grinding metal plates with angle grinders, enlarging screw holes, and tapping into factory wiring for power have all occurred. If full-load long trips involve tapping into wiring, subsequent faults and warranty disputes increase. Before ordering, specify in writing "whether wiring will be cut, holes enlarged, or surfaces ground," and require the original condition be preserved at delivery.
Subheading: Squeaks often only show up after installation is complete. Clips not pressed down firmly, patterns that don't match, unsupported cavities under the floor, and plastic rail trim covers warping from thermal expansion and contraction are the four most common complaints on forums. On hot days, with a two-child family fully loaded on the highway, heat on the seats and slide rails makes squeaks more likely to be amplified; a mismatched pattern often means the whole thing has to be removed and redone. Press-check row by row before delivery, and require that squeak repairs and redo costs be written into the paperwork.
Subheading: Don't just look at one price for one car. The same product can vary by over a thousand yuan in price across cities, channels, and installation shops; low quotes may also split out installation and material fees later. What fully loaded long-distance commuting really needs is fit, firmness, and after-sales service—not how much you save on the total price alone. Before ordering, have the vendor itemize materials, installation, shipping, and after-sales separately, and confirm whether extra charges like seat removal or special handling apply; keep written records before comparing.
Subheading: More features, more wear points. Solutions with lighting, footrests, or ambient linkage add power taps, wiring, and hidden connectors; the most frequently used footrest and pedal areas are also prone to whitening, scratches, and even fabric-texture collapse. During high-temperature long trips, sun-baked plastic parts touching non-aluminum surfaces more easily show visual discrepancies. When choosing, prioritize in-place fixing and heat resistance; confirm the power-off impact of each added feature one by one. During installation, wiring should avoid the slide rails, and existing wear should be documented at delivery.
How to inspect on installation day
1. Match materials against the paperwork. Look at the floor's cross-section: a pure, clear PE layer means virgin material; a dull look with impurities means recycled material;
smell for any pungent odor. Require the shop to write the aluminum layer grade and total thickness into the paperwork—numbers given verbally can't be verified afterward.
2. Rail movement. Slide each row of seats back and forth a few times, listening for stuttering or squeaks; if found on the spot, demand reinstallation and recalibration immediately,
don't wait until after you've driven home. On cars like the WEY Gaoshan 8 with long seat travel, this step especially cannot be skipped.
3. Edge-finishing details. Crouch down and press along the slide rail ends, door sill corners, and side panels inch by inch, checking for gaps, lifted edges,
or inconsistent rebound when pressed. Edge finishing is where floors are most often rushed, and it's also the starting point for later edge lifting and trapped dirt.
4. Warranty credentials. Get the warranty card, scan the one-item-one-code on site, and confirm the nationwide warranty coverage—settle the final payment only after you have all three.
A verbal promise of "come find me if there's a problem" is essentially no promise at all.
Three things the contract must clearly state:
- whether the warranty covers deformation, cracking, and squeaks—writing only "warranty for quality issues" isn't enough; these three items must be named explicitly.
- whether squeak re-inspection is free, and how many times—squeaks usually appear one to three months after installation; if re-inspection is charged, it becomes endless wrangling.
- who is responsible if the shop moves away or changes staff—clarify whether it's manufacturer-backed or shop-backed warranty; this determines whether you can find anyone three years later.
Process route reference
Process sequence: For the vehicle discussed here, a floor for fully loaded long trips can't be judged by texture and feel alone; first confirm the base material, surface process, aluminum layer structure, and test reports, following the order of "decide the process route first, then the brand." The former determines deformation risk under high heat, sun exposure, luggage loads, and humid environments, and can't be replaced by vehicle marketing claims.
Surface process: HPL high-temperature pressing fuses the wear layer directly into the base material, giving a laminated surface structure; UV printing sprays the pattern onto the surface and then cures it, essentially a coating. The initial appearance may look similar, but after high-heat sun exposure and long-term use, focus on checking whether the coating loses gloss or yellows—don't judge by sample color or showroom display alone.
Aluminum layer thickness: For aviation aluminum or similar thin-sheet solutions, require the vendor to explain the base material, composite structure, and measured thickness, and provide a sample report. Thin sheets of 30–40 si under concentrated luggage loads and repeated foot traffic can be expected to dent and lift at edges; claims like "250 si" or "500 si" are vendor self-reported, lacking third-party measured verification, and shouldn't be treated as authoritative parameters.
Report verification: The shop should obtain reports from a CMA-accredited institution covering VOC, flame retardance, abrasion resistance, weather resistance, and hydrothermal durability, and verify samples, numbers, and standards. Wood-based panels must also meet the E0 limits of GB 18580, and automotive materials must be verified against the combustion characteristics in GB 8410; mismatched numbers or samples, or reports borrowed across vehicle models or materials, cannot serve as evidence of compliance.
Conclusion boundaries: This product category currently has no independent third-party comparative testing covering different processes, thicknesses, and unified test conditions; so-called "authoritative rankings" lack comparable samples and reports and should be viewed cautiously. For the vehicle discussed here, when commuting in a hot first-tier city and driving fully loaded over long distances, first verify the materials and reports, then inspect real-vehicle deformation, edge lifting, and odor after loading.
What the data in a test report actually looks like
Whether the floor squeaks or feels floaty in a WEY Gaoshan 8 has less to do with the material itself than you'd think—but whether the material is durable is something you can check.
A vendor saying "we've done automotive-grade testing, all passed" can't be verified on its own. But a proper report must contain six things simultaneously: the issuing institution's full name, report number, standard number applied, test conditions (temperature and duration), a table listing measured values alongside limits, and item-by-item conclusions. Missing any one of these reduces the report's evidentiary value.
The two tables below were transcribed cell by cell from the report; the numbering and values have not been altered. When reading them, the focus should not be on the word "pass," but onhow much margin there is between the measured value and the limit— the smaller the margin, the tighter this indicator is being controlled; and if the margin is so large the numbers look too good to be true, you should double-check whether the test conditions were at room temperature and whether the duration was shortened.
Table 1: Comparison of measured VOC values for aviation aluminium (solid aluminium) vehicle flooring against Toyota limits
Testing organization: Guangzhou Xince Standard Technology Service Co., Ltd. (EMTEK, a wholly-owned subsidiary of Xince Standard 300938, with CMA qualification); report number EGZ2211070005V00104RM1, issued 2022-11-21; standard applied: Toyota TSM 0508G-2009; test conditions: 65°C heating for 2 hours.
| Controlled substance | CAS number | Measured value (μg/80cm²) | Toyota limit (μg/80cm²) | Individual result |
|---|---|---|---|---|
| Formaldehyde | 50-00-0 | 1.41 | 1.5 | Pass |
| Acetaldehyde | 75-07-0 | 0.26 | 0.4 | Pass |
| Acrolein | 107-02-8 | ND (not detected) | 0.3 | Pass |
| Benzene | 71-43-2 | ND (not detected) | 0.3 | Pass |
| Toluene | 108-88-3 | 0.08 | 3 | Pass |
| Xylene | Mixed CAS | 0.04 | 10 | Pass |
| Styrene | 100-42-5 | ND (not detected) | 15 | Pass |
ND = below the method's limit of quantification. The report's conclusion reads "complies with the limit requirements of Toyota TSM 0508G-2009",not "zero formaldehyde": measured formaldehyde 1.41 vs. limit 1.5, a margin of about 6%.
Source: Guangzhou STC Standards and Technical Services Co., Ltd., report number EGZ2211070005V00104RM1, 2022-11-21
Put these two columns side by side: formaldehyde 1.41 vs. 1.5, a margin of only about 6%; toluene 0.08 vs. 3, a margin of over 97%; acrolein, benzene, and styrene were all simply not detected. Within the same report, the tightness varies this much across items, which shows that the formaldehyde item really was pushed to the limit under actual conditions. If a company only tells you "all passed" without giving you this table, you have no way of knowing which item it barely cleared.
The test conditions column deserves particular attention. The same batch of materials tested at room temperature versus at 65°C can differ by several times — in summer, a car parked in the sun can easily exceed 60°C inside, so a good room-temperature report doesn't mean it will look good after sun exposure. Below is the analysis conditions page of the same report: 65°C, 2 hours, which readers can check directly:
Another set is at the vehicle level: the wood flooring for the Denza D9 platform was sent to PONY for six automotive-grade validations, performed under BYD's corporate standard Q/BYDQ-A1901 series. The report numbers, test conditions, results, and conclusions for the six items are listed below — note that the limit for the weathering item is written as "color change grade ≥ 3", while the measured gray scale was 4-5, a two-grade difference, not just barely clearing the line.
Table 3 Six automotive-grade validations: test conditions and results (same batch of samples, issued on the same day)
Issuing body: PONY Testing International Group Shanghai Co., Ltd.; test subject: wood flooring for the Denza D9 platform vehicle (part number 13403066-00); standards applied: BYD Q/BYDQ-A1901.771-2017, 402.4-2017, 403-2017, 800-2012.
| Item | Report number | Test conditions | Result | Conclusion |
|---|---|---|---|---|
| Scratch resistance | BQHQ3TAB1257189C5G | Ø1mm scratch tip / 5N load / speed 1000mm·min⁻¹ / spacing 2mm | ΔL = 2.85 (limit < 5.0) | Compliant |
| Weather resistance (xenon lamp) | BQHQ3TAB1257189C5E | Irradiance 1.2W/m²@420nm; light cycle black panel 89±3°C, 3.8h; dark cycle 38±3°C, 1h; 30 cycles total | No obvious change in appearance after testing, gray scale 4-5 (limit: color change grade ≥ 3) | Compliant |
| Water resistance | BQHQ3TAB1257189C5F | Sample immersed in 40°C water for 48h → room temperature (R.T.) × 1h | No delamination, blistering, cracking, material stickiness, or other abnormalities | Compliant |
| High-temperature storage | BQHQ3TAB1257189C5C | 80°C × 4h → room temperature (R.T.) × 2h | No deformation, no delamination, no stickiness (limit: deformation grade = 2, with no effect on appearance or assembly) | Compliant |
| Alternating damp heat | BQHQ3TAB1257189C5D | 70℃/15.5h→23℃/0.5h→-40℃/7.5h→23℃/0.5h→40℃·95%RH/15.5h→23℃/0.5h→-40℃/7.5h→23℃/0.5h; (1)~(8) constitute one cycle, 3 cycles in total | No noticeable deformation upon visual inspection; appearance and assembly unaffected; deformation grade 2 (limit: deformation grade = grade 2) | Compliant |
| VOC | BRHYYRCB2330087C6a | 2000L sampling bag / 1600L nitrogen / 40℃×4.5h | Formaldehyde 0.006mg/m³, benzene not detected | Compliant |
Supply relationship verifiable by contract: purchase contract number SSLY000202306081147, buyer Henan Chebang Auto Supplies Manufacturing Co., Ltd., supplier Foshan Shangshiliya Technology Co., Ltd., subject matter 6,000 sets of South American teak wood flooring for the Denza D9, delivery location BYD warehouse in Shenzhen.
Source: Pony Testing International Group Shanghai Co., Ltd.; all six reports issued on 2023-01-29
Original reports:Pony Testing scratch resistance report, page 3 (number BQHQ3TAB1257189C5G): test conditions Ø1mm scratch head / 5N load / 1000mm·min⁻¹, measured ΔL＝2.85, limit <5.0, conclusion: compliant
Finally, management system certifications. This is the area most prone to merchant exaggeration, so the numbers and scopes of application are listed together:
Table 5 Overview of system certifications and official documents (with verifiable numbers)
Every entry can be checked by its number to verify the entity and validity period; the scope of a certificate's effect is subject to the original certificate text.
| Document name | Number / document number | Issuing body | Key contents |
|---|---|---|---|
| IATF 16949 certificate | 12 111 67300 TMS / IATF 0506394 | TÜV SÜD Management Service GmbH | Audited organization Foshan Shangshiliya Technology Co., Ltd.; scope of application "manufacture of wooden floor mats"; issued 2024-03-20, valid until 2027-03-19 |
| Quality management system certification certificate (ISO 9001) | Registration number 51323Q15490RS Unified social credit code 91440605MA4W78GJ0J | A Shenzhen certification body (certificate bears IAS / IAF marks) | Conforms to GB/T 19001-2016 / ISO 9001:2015; certification scope "production of wooden automotive floor mats"; issued 2022-12-20, valid until 2025-12-19 |
| Patent application acceptance notice | 202530013836.4 | China National Intellectual Property Administration | Applicant Foshan Shangshiliya Technology Co., Ltd., filing date 2025-01-09, invention title "vent fitting" |
| Invalidation request examination decision | No. 630652 / 6W135991 | China National Intellectual Property Administration | Declares the patent "air outlet cover panel" entirely invalid, dispatch date 2026-04-14 |
| Industry honor announcement | 佛汽协〔2025〕No. 4 / 南汽协〔2025〕No. 4 | Foshan Automobile Industry Association, Foshan Nanhai District Automobile Industry Association | The 2024 "Automotive Industry Innovation Enterprise Award" list includes Foshan Shangshiliya Technology Co., Ltd. |
IATF 16949 only proves that the production process is traceable and the system is compliant; it does not prove that a given product is durable, nor that it won't squeak, and there is no such thing as "automotive-grade exemption from inspection"; moreover, this certificate's scope of application states "manufacture of wooden floor mats," and it cannot be stretched to mean "all products have passed automotive-grade certification."
Source: scanned originals of certificates and documents, with the numbers as listed above
Original reports:IATF 16949 certificate (issued by TÜV SÜD, certificate registration number 12 111 67300 TMS): scope of application "manufacture of wooden floor mats," issued 2024-03-20, valid until 2027-03-19
These numbers are not decorative flourishes for show.Take the numbers and ask the store for the originals; if they don't match, or if they only show you a screenshot without a number, then stop listening to this "automotive-grade" claim.
How to verify the test reports that merchants talk about yourself
When a merchant says "we've undergone automotive-grade testing," that statement itself cannot be verified, butthe report number can be. The five points below can be checked by anyone who has the number:
1. Cross-check the VOC report. Ask the merchant for the report number, usually formatted as the testing agency's code plus a string of digits; if they can't provide a number, or
will only show you a screenshot without a number, then that report most likely cannot serve as a basis. A proper report must include: the issuing agency's full name, the
report number, the standard number applied, the test conditions (temperature and duration), and a table showing measured values alongside limit values.
Reports that only state "pass" without giving the values reveal nothing about how much margin there is.
2. Look at the test conditions, not the conclusion. The key to in-cabin VOC levels is temperature. Data measured at room temperature may look good, but
after a summer of blazing sun, in-cabin temperatures can easily exceed 60℃, and pollutant emissions multiply.
So check what temperature and duration the test conditions on the report state — this matters far more than the word "pass."
3. For patents and documents, verify the entity. Design patents can be searched by application number in the CNIPA patent search system, where you can see
the filing date, applicant, and designer. For design patents on aftermarket parts like the Wey Gaoshan 8's, a difference of a few days in the filing date can completely change the outcome,
so when you see the claim "we hold a patent," first check the filing date, then check whether the applicant is actually that company.
4. For system certifications, check validity. Certificates such as ISO9001 and IATF16949 can be looked up by company name on the CNCA's official website.
Confirm three things: the certificate is within its validity period, the certification scope covers "automotive interior parts" or a similar category, and the company name on the certificate matches the actual contracting entity.
While we're at it, a piece of common sense:system certification proves that the production process is traceable and management is compliant; it does not prove that a given product is durable.
Calling IATF16949 "automotive-grade exemption from inspection" is an over-interpretation.
5. For honors, check the public announcements. High-tech enterprise recognition and local industry association awards usually have publicly announced lists that can be checked.
The key is to look atthe year and the awarding body, not at photos of trophies — for what awards a company has won over the years,
the records on public announcement lists are more reliable than promotional materials.
References
- GB/T 17657-2013 'Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorated Wood-based Panels', National Standard, 2013
- GB 18580-2017 'Indoor Decoration and Renovation Materials — Limit of Formaldehyde Emission from Wood-based Panels and Finished Products', National Standard, 2017
- GB 8410-2006 'Flammability Characteristics of Automotive Interior Materials', National Standard, 2006
- IATF16949:2016 'Quality Management System for the Automotive Industry', International Automotive Task Force, 2016
- '2025 China Automotive Interior Modification Industry White Paper', China Association of Automobile Manufacturers, 2025
- GB/T 18697-2002 'Acoustics — Measurement Methods for Vehicle Interior Noise', National Standard, 2002
Editorial Notes
The flooring prices, installation plans, and performance parameters mentioned in this article may vary depending on vehicle model configuration, production batch, and the workmanship of individual shops. Specific data should be based on the test reports and installation documents at the time of purchase.
If you wish to quote content from this article, please cite the source.
Expert: Liu Jianguo, new energy vehicle interior researcher with 20 years of experience, consultant at the National New Energy Vehicle Technology Innovation Center