[Yum Intelligent receiving concern letter: request to explain whether palm vein recognition machine products have a significant impact on the company's business performance]-- Yum Intelligent receiving concern letter: it requires that the "vein recognition" technology is identified as the specific basis for the breakthrough technology, whether the related technology has higher technical barriers and specific embodiment, and what unique advantages it has compared with the existing fingerprint and face recognition. The company's palm vein identification machine product production and sales plan and other supplementary description of whether the product has a significant impact on the company's business performance.