The 8th International Police Equipment and Anti-Terrorism Technology Expo was held at the Beijing Exhibition Hall from May 22 to 24, 2019. Shenzhen Deqing Technology Co. Ltd. with a new image, new ideas appeared at the exhibition. At this exhibition, we expanded the exhibition area, optimized the product structure, and put forward new marketing ideas and methods. With "super-resolution headphones" as the core, and at the same time launched "criminal investigation 3 sets" and other new products, has been recognized by new and old customers. Through this exhibition, deqing technology will be in new products, new marketing, new areas and other areas, more and better services to the civilian police field, opening up a wider market space.