The registration address of the company for environmental science and technology, ltd., is located in the village of piedon mau, grand town, chanchoang city, hebei province, with the registration authority being the market supervision authority of the grand city and district of yuang city, with the legal personality representing liu yiang, and its scope includes general projects: technical services, technology development, technical advice, technology exchange, technology transfer, technology promotion; new materials extension services; ecological materials manufacture; heat insulation and soundproof material manufacture; insulation and soundproof material sale; light construction materials manufacture; paint manufacture (without hazardous chemicals); paint sales (without hazardous chemicals); fireproof material production; fireproof material sales; construction water-proofing products manufacture; construction water-proof products sale; sealed fillings manufacture; sealing of sealed materials; sales of sealed materials; sale of building materials; sale of metal materials; sale of anti-corruption materials; sale of plastics; sale of chemical products (without licensed chemical products). (ii) licensing of projects (in addition to those subject to legal authorization, the operation of which is carried out on an autonomous basis under a licence): construction work. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)