The registration address of henan shengka environmental science and technology ltd is on the 2nd floor of the a2nd floor of the hanfeng industrial park at wanhong road, hong kong county, henan province, with the registration authority being the china-profit district market supervision authority, with the legal personality representing zhang na-chung and covering the range of environmental technical advice; filtering technology development, technical advice, technical services, technology transfer; production and marketing of filters, filtering equipment, filtering elements and accessories, water purification materials, cleaning systems; and import and export of goods and technologies (except for the import and export of goods and technologies that are prohibited by the state or involve administrative approval)。