Pre-inspection No.2 came out, and there was another national patent. More popular with people. Pre-check the double detection of two derivatives of hydroxyphenylalanine and 5- hydroxyindoleacetic acid by urine monohydroxy phenol detection reagent No.2. 3 minutes of tumor screening before trial 2; B Pre-test 2 can detect cancer within 3 minutes. Pre-inspection No.2 is a high-tech product independently developed by Jinhua Zhongjia Shangpin Biotechnology Co., Ltd. and applied to the detection of major metabolic diseases after 15 years. This technology is 5 to 10 years ahead of the world, which makes up for the gap in this medical field in China.