The registration address of zhang da drying trades and trades ltd. Is located on the tailong road in ryuyo township (opposite a secondary school) in the city of ryudai, hebei province. The registration authority is the market supervision authority of ryuya county, represented by a legal person, zhang shu xian, which operates in the form of wholesale and retail distribution of water coatings, rubber products, gold and other chemical products (except dangerous chemicals). (projects subject to legal approval may not operate without the approval of the relevant department)