Sema crystal sleeve was developed and produced by Shandong Lishi Mingxin Biotechnology Co., Ltd. According to relevant data, Sema freckle removing products were developed and filed by Shandong Lishi Mingxin Biotechnology Co., Ltd. The product is real, but the evaluation of the specific effect on the Internet is uneven, and some large e-commerce platforms on the Internet are not sold. They are all purchased through WeChat. The specific effect and safety need to be verified.