With the continuous advancement of science and technology, the field of security industry continues to expand. Specialized services such as alarm operation, intermediary, and information began to take off; the product types continued to be enriched, and it developed into a dozen categories and thousands of varieties such as video surveillance, entrance and exit control, intrusion alarm, explosion-proof security inspection, etc.; closed-circuit surveillance developed rapidly with annual growth The rate reached about 30%; coastal areas developed rapidly, forming three major security industry clusters centered on the Pearl River Delta, the Yangtze River Delta, and the Beijing-Tianjin area.