The registered address of yen long ring seal materials ltd. Is in the ex-smoking village of the town of guangcheng, hong kong city, hebei province, with the registration authority being the grand city and county market supervision authority, with legal representatives and with the following scopes: processing and sale of sealed materials, rubber products, rubber products, glass cotton products, rock cotton products, aluminium silicate products, silicate products, polyurethane products, water treatment agents, resins, mechanical equipment and accessories; technical research and development, technology promotion and technical services for sealed materials. (projects subject to legal approval may not operate without the approval of the relevant department)