Useful. Nanjing Tongrentang Hair Care Liquid has outstanding effect. Nanjing Tongrentang Hair Care Liquid bought at Pinduoduo is useful. The washed hair is soft and needs long-term use to get better results. Pinduoduo is the mainstream mobile shopping APP in China. Founded in September, 20 15, users buy goods at lower prices by launching a team battle with friends, family and neighbors.