The registration address of shandong sentinel security equipment ltd. Is located on the fourth floor of the building no. 1 of the 9th-party innovation valley accelerator of qingyun lake street, located in chinan district, shandong province. The registration authority is the qiandong district market supervision authority, which is represented by legal persons. It covers public safety equipment, instrument instruments, alarms, daily miscellaneous items, fire protection equipment, gas-fired equipment, valves, mechanical and electrical equipment, mine machinery, environmental protection equipment, hardware and equipment, gold products, mechanical and electrical equipment, plastics, compressors, electronics, computer hardware and hardware development, sale and maintenance; the processing, production and sale of labour protection items, clothing caps, needle textiles, security equipment; the professional contracting of water protection against corruption and temperature engineering; the contracting of electronics and intelligent engineering; the installation, technical services of automated control equipment; the import and export of goods and technology (except for the import and export of goods and technology that are prohibited or related to administrative approval by the state); the sale of medical equipment and accessories and food products. (projects subject to legal approval may not operate without the approval of the relevant department)