The registration address of the psaihan-king science and technology company ltd. In shenzhen city is located at factory no. 21101b, 11th floor, 9th floor, 1st floor, located at zhao zhou zhang, on the streets of ryonghua, shenzhen city, and is the ronghua superintendence of the shenzhen market supervisory authority, whose legal representative is zhao chang zhao zhou zhou zhou zhou zhou zhang zhang, operating in the area of internal trade, goods and technology import and export. • development design, production and processing of rotors; research and development, manufacturing and technical services for non-target equipment。