The registration address of shenzhen city sung-jung electric technology ltd. Is located in shenzhen city, shenzhen city, on the street of yonggang city, shenzhen city, and is attended by a student from shenzhen city (yengang) who is registered as the shenzhen market supervisory authority and is represented by a legal person, mao shenghai. The activities include general operations such as the development and sale of integrated circuits; the development and sale of electronics software and hardware; the development and purchase of mechanical and electrical products, energy-efficient products and moulds; the development and sale of software and hardware for the internet (intelligence homes, smart buildings, agriculture, intelligent transport); and domestic trade. Production of teaching models and teaching aids; sale of teaching models and teaching aids; manufacture of teaching equipment; sale of teaching equipment; sale of teaching equipment; manufacture of optical equipment; sale of optical equipment; manufacture of material enrichment equipment; sale of material enrichment equipment. (a) licensing of projects (in addition to projects subject to legal authorization, operating on an autonomous basis in accordance with the law): processing and purchase of precision machinery. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)