[Yum Intelligence: the company's metacarpal vein recognition machine applied non-independent research and development of metacarpal vein recognition technology] May 29, Yum Intelligence replied to the concern letter of Shenzhen Stock Exchange that the company's metacarpal vein recognition machine applied metacarpal vein recognition technology. Non-company independent research and development, the company has not applied for a patent for metacarpal vein recognition technology. The palmar vein identification machine developed and applied by the company is security equipment, and the company has not applied for the relevant patent of the metacarpal vein recognition machine. The palmar vein recognition machine of the company is still in the market promotion stage, and there is no substitute relationship with fingerprint and face recognition equipment in the short term, which will not have a significant impact on the company's existing product structure and business performance. At present, the company is not involved in household humanoid robot business, the company's main business is not related to household humanoid robot, and there is no technical reserve and R & D investment related to household humanoid robot.