Standard: Environmental Protection Number: / Issue Date: 2021-01-06 Scope/Range: / Issued By: Hunan Environmental Governance Industry Association

Standard: Environmental Protection Number: / Issue Date: 2021-06-01 Scope/Range: / Issued By: China Association of Urban Global Sanitation

Standard: Environmental Protection Number: 430120210970-M Issue Date: 2022-05-02 Expiry Date: 2023-03-31 Scope/Range: / Issued By: Chinese Association of Urban Global Sanitation

Standard: Number: 00389 Issue Date: 2021-08-13 Expiry Date: 2022-08-12 Scope/Range: / Issued By: China Geosynthetics Engineering Association

Standard: Patent Certificate Number: ZL202020668523.4 Issue Date: 2021-01-19 Scope/Range: / Issued By: State Intellectual Property Office of the P.R.C

Standard: Patent Certificate Number: ZL201020160558.3 Issue Date: 2021-01-26 Scope/Range: / Issued By: State Intellectual Property Office of the P.R.C

Standard: Patent Certificate Number: ZL201320401254.5 Issue Date: 2015-07-15 Scope/Range: Issued By: State Intellectual Property Office of the P.R.C

Standard: Patent Certificate Number: ZL 201320400777.8 Issue Date: 2014-03-26 Scope/Range: / Issued By: State Intellectual Property Office of the P.R.C

Standard: Patent Certificate Number: ZL201020160595.4 Issue Date: 2010-12-01 Scope/Range: / Issued By: State Intellectual Property Office of the P.R.C

Standard: Safety Production License Number: (湘)JZ安许证字[2018]000752 Issue Date: 2024-05-08 Expiry Date: 2027-05-07 Scope/Range: Construction Issued By: Department of Housing and urban-rural construction of Hunan province

Standard: Qualification Certificate of Construction Enterprise Number: D243336796 Issue Date: 2024-04-22 Expiry Date: 2025-04-18 Scope/Range: / Issued By: Department of Housing and urban-rural construction of Hunan province