The 21st China International Hi-Tech Fair was closed in Shenzhen on the 17th. The total exhibition area of the high-tech fair reached 142,000 square meters, with a total of 3,315 exhibitors participating in the exhibition, showing 10,216 high-tech projects, including artificial intelligence, smart home, intelligent manufacturing, Internet of Things, smart driving, 5G commercial, 8K ultra HD , blockchain technology, emergency safety and other fields. A total of 148 groups from 44 countries and international organizations participated. Exhibitors at home and abroad bring a large number of industrial-grade UAVs, machine vision, 5G+8K intelligent security, ultra-fast laser, blockchain, smart factory, intelligent voice control and interaction technology and intelligent sensory recognition integrated fingerprint AI chip. High-tech products and technologies, a total of 2,077 new products and 701 new technologies debut, a total of more than 400 more than last year.