Zhang yuan yuan, a legal person, is represented by zhang yuan yuan yuan, who has a registered address in the acorns management training base in zhengzhou, geong county, hebei province, and operates in the field of scientific and technological development of new pipe products: production, sale of vehicles into exhaust systems pipes, motors into and out of gas systems pipelines, motors into and out of pipes, metal hoses and other vehicle parts, hydraulic fittings, rubber products, plastics, amphibious metal pipelines and technology transfer** (project authorized by law and subject to approval by the relevant department)