The registration address of the beijing union of the united nations science and technology company ltd. Is located in room no. 545, no. 10, no. 10, no. 545, ma qikou township, changping town, beijing city. The registration body is the market supervision authority of changping district, beijing city. It is represented by zhang mingqiang and operates on technical development, technology promotion, technical services, technical advice; the sale of computers, software and assistive equipment, mechanical equipment, electronics, hardware exchange of electricity (without electric bicycles), car parts, building materials, clothing, footwear hats, daily supplies. (an enterprise shall, in accordance with the law, freely choose to operate a project for the purpose of carrying out its activities; an approved project shall, in accordance with the law, operate on the basis of the approved content, subject to the approval of the relevant sector; and it shall not engage in activities in which the industrial policy of the district prohibits or restricts the operation of such projects