Nanjing Tongrentang is a Chinese medicine enterprise with a long history and good reputation. The Chinese Zen wash produced by it adopts a variety of natural Chinese herbal medicine plant ingredients and is made by scientific formula and strict technology. These Chinese herbal medicine plant components have rich nutrition and health care functions, and can effectively care for hair fibers, making the hair color brighter, richer and lasting black. After washing, the hair becomes healthy, supple, black and shiny, the hair roots are firm and do not lose hair, and the coloring is simple. It is suitable for treating white hair and yellow hair. As a professional Chinese medicine enterprise, Nanjing Tongrentang has rich R&D experience and advanced production technology, so Chinese Zen washing is more reliable and authentic.