Zhang zhang was represented by a legal person, whose registered address was located in the villages of jiang jianggian chemical materials ltd., located in the grand township of yugang, kanyung city, hebei province. The legal entity was represented by zhang zhang zhang zhang, and was involved in the processing and marketing of: boiler aids; sales of: water treatment agents, thermostats, grid cloths, ion exchange resins, rock cotton products, glass cotton products, silicate products, calcium silicate products, aluminium silicate products, rubber products, asbestos products, fire protection materials, fire resistance materials, sealed materials, building materials. (projects subject to legal approval may not operate without the approval of the relevant department)