The registration address of the beijing sinosein source science and technology company ltd. Is located on the 13th floor of unit 1, unit 1, no. 1, building no. 87, west road, built-in-tilk, in changping district, beijing. The registration authority is the changping branch of the beijing municipal administration for business and industry, which operates in the areas of technical development; sale of computers, software and assistive equipment, cultural goods, electronics, electronics, electronics, hardware exchange (other than electric bicycles), communications equipment, japanese supplies, plastics, instrumentation forms。