The registration address of hebei ring positive filters ltd. Is located in workshop no. 3 in workshop no. 4 (cross) at the ambowan business guidance base in anping county. The registration authority is the market supervision authority of anping county in the city of water control. The legal entity is represented by zhang jiu, and its operations include the production and sale of filtering equipment, wedge networks, filtering cores and import and export operations (project subject to approval by the relevant authorities in accordance with the law)