DONG YANG SPECIAL WOOD CORPORATION. has secured with the national best technology, which approved by certificates and patents.
| Number | Certificate | Title | Authentication code | Acquisition date | Download | |
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| 1 | Sugi louver fire retardant test report | 1608435 | 16.09.21 |  |
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| 2 | Sugi siding fire retardant test report | 1608436 | 16.09.21 | |
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| 3 | Fire retardant test report (fire retardant) | 1405389 | 14.06.27 | |
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| 4 | Heat release rate test report (fire retardant) | 1405839 | 14.07.17 | |
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| 5 | Gas harmfulness test report (fire retardant) | 1405838 | 14.07.17 | |
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| 6 | Fire retardant performance inspection(12983-15997) | 1802006 | 18.03.06 | |
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| 7 | Fire retardant performance inspection(97134-97933) | 1801142 | 18.02.06 | |
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| 8 | Phytoncide liquid (skin irritation) test report | TBW-000373 | 14.12.23 | |
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| 9 | Phytoncide (Cypress) antibacterial test report | CT14-106000 | 14.11.14 | |
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| 10 | Phytoncide (Cypress) deodorization test report | CT14-105999 | 14.10.30 | |
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