I know this. The product developed by Professor Wang Linyuan of Beijing University of Chinese Medicine, Phytoextract Qingfeng Drink, has national patent certification, and its safety is guaranteed. The patent of Plant Extract Qingfeng Drink is called "Chinese medicinal composition for treating gout and its preparation method". It is good for preventing and improving gout symptoms, and the extraction of ingredients is also patented. It has relatively few impurities and no heavy metal residue. There is no burden to absorb.