The "Tongtianji Damp and Heat San", which originated from the "Tongtianji Pharmacy" in the Guangxu period of the Qing Dynasty, has a history of more than 100 years. The "Tongtianji Pharmacy" was founded in 1889. Its founder is the famous Hakka old Chinese doctor Mr. Liang Qiuping. Cheng Kangpu, a famous old Chinese doctor from Lingnan. Its traditional manufacturing processes, traditional craftsmanship and reasonable composition have been passed down to this day. Centuries of clinical use has verified its definite efficacy in clearing away heat and dampness, astringent intestines and relieving diarrhea, without adverse reactions and side effects. In 1980, through process optimization, the original powder was changed to tablets, which is more convenient to take on the basis of ensuring the efficacy of the medicine, which is affirmed by the majority of patients. In 2007, he obtained the invention patent of "a Chinese medicinal composition for the treatment of damp-heat of large intestine and its preparation method" by the State Intellectual Property Office. It has a strong market advantage in South China, and its sales network now covers the whole country and is exported to overseas.