The registration address of hebei sen gate and window technology ltd. Is located at no. 85, at the intersection of ishijia zhuang, mayor of hebei province, and ishi fong town street. The registration authority is the market supervision authority of chang an district, represented by a legal person, sun zhong rai, and operates on other technical promotion services. Technical research and development, technical advice, technical services, technology transfer of doors and windows; interior and exterior decorator work, design and construction of the curtain wall; sale, installation of doors and windows; sale of metal products (other than rare metals), hardware products, ornamental materials, construction materials, plastics (other than medical plastics); image planning; marketing planning. (projects subject to legal approval may not operate without the approval of the relevant department)