Derentang was founded by Mr. Le Daren of Beijing Tongrentang, who came from a medical family, at the beginning of the last century. Because its shop sign had the same name as "Chengdu Chen Tongrentang", it was renamed "Darentang". In 1948, it was renamed "Derentang" and has remained so ever since. In the old days, Derentang's business was mainly ginseng and antler pills and powders, supplemented by chewing tablets. It produced and sold its own products in the form of a shop in front and a workshop in the back. Derentang has extremely high requirements for the quality of medicines. In terms of material selection, it must choose genuine materials, and will not buy any goods that are not genuine, and will not replace inferior ones with good ones, replace old ones with new ones, and replace Guangdong ones with Sichuan ones. It insists on following the ancient processing methods and making fine craftsmanship. In addition to hiring doctors to sit in the hall, Derentang also processes pills, powders, and ointments for customers, sells them by mail, and delivers them to customers' homes, which is well received by customers. Chengdu Tongrentang, a subsidiary of Derentang, has a 268-year history of traditional Chinese medicine. Chengdu Tong Ren Tang is an ancient Chinese medicine shop. It was opened in the intersection of Huguangguan Street in Chengdu in the fifth year of Emperor Qianlong's reign in the Qing Dynasty (1740). It specializes in pills, powders, pastes and pills. It is famous for its remarkable efficacy, genuine goods and fair prices. Chengdu Tong Ren Tang was a feudal family shareholder enterprise in the past. The equity of each shareholder was reduced from generation to generation. In addition, the power was rotated, so no one could control the company, so it could survive for a long time. In terms of personnel arrangements, the public discussion and public recommendation system was adopted. There were only five positions in the store, and five people were recommended from the family to take up the positions. Major issues were decided by the five people at a meeting. A complete set of management systems including store rules, employment, treatment, shareholders' meeting and dividend distribution were established in the store to ensure order inside and outside. Chengdu Tong Ren Tang's medicinal diet grew and took shape along with the development of Chengdu Tong Ren Tang Pharmacy. According to relevant historical records and research, as early as the tenth year of Emperor Qianlong (1745), five years after Chengdu Tong Ren Tang opened, due to good business, many merchants came from far away to buy medicine. Some merchants even rented a place not far from the pharmacy temporarily to treat their illnesses. At this time, Chengdu Tong Ren Tang not only sold medicine to them, but also prepared some conditioning medicated diets for them according to their condition, in order to achieve the best therapeutic effect. Afterwards, the pharmacy set aside an area to provide "diet therapy, medicated porridge, medicated wine, etc." for auxiliary treatment, with remarkable results, and proposed the advanced theory of medicated diet that "if diet therapy does not work, then use medicine". In 1980, Chengdu Tong Ren Tang further developed medicated diet and established the medicated diet department independently in the form of an enterprise, renamed "Imperial Kitchen Palace". "Imperial Kitchen Palace" is the earliest catering enterprise in my country with medicated diet as the theme, and has written the first Chinese medicated diet monograph "Chinese Medicated Diet Encyclopedia" since the liberation, which is known as "the first Chinese medicated diet". After the public-private partnership, Derentang and Chengdu Tongrentang merged into one, with three famous brands, "Derentang", "Chengdu Tongrentang" and "Yushan Palace", and a large number of well-known century-old pharmacies including Taisantang, Gengding Pharmacy, Dachuntang, Baoshengtang, Huiantang, Jingyitang, etc. In the inheritance and development of its century-old history, Derentang has gradually formed a Derentang-style Chinese medicine culture that integrates diagnosis and treatment, traditional Chinese medicine preparation, and medicinal diet. Derentang follows the concept of "Deren, saving the world and maintaining health" and has always followed the tradition of Chinese medicine practitioners sitting in the clinic. The famous old Chinese medicine practitioners in the Chinese medicine clinic use their superb medical skills and warm and thoughtful service to solve problems for the majority of patients, especially in solving difficult and complicated diseases, which has been praised by the majority of patients and praised by domestic and foreign guests as "a house full of benevolence and righteousness". Derentang adheres to the ancestral motto of "no matter how complicated the preparation is, we must not save on labor, no matter how expensive the taste is, we must not reduce the material resources". The Chinese herbal medicine slices processed and produced according to the ancient method are highly respected by clinical Chinese medicine practitioners and loved by customers for their beautiful appearance and guaranteed efficacy. The essence of traditional processing techniques such as cutting, frying, roasting, and calcining of Chinese medicine processing has been inherited in Derentang, especially the exquisite hand-cutting technology passed down for generations, and the refined herbal medicine slices processed are of high quality and significant efficacy. Derentang's Chinese herbal medicine slices are processed and processed Chinese medicinal materials, and their quality enjoys a high reputation in Sichuan and even the whole country. Derentang Imperial Kitchen combines health-preserving medicinal diet, the essence of imperial court cuisine and Sichuan cuisine, creating a unique medicinal diet health-preserving feature. Derentang Imperial Kitchen has always taken it as its mission to advocate health and well-being, constantly integrating and boldly innovating, and perfectly combining traditional diet therapy with food. In 1740 (the fifth year of Emperor Qianlong's reign), Chengdu Tong Ren Tang's predecessor, "Chen Tong Ren Tang", opened for business. Chengdu Tong Ren Tang has always followed the business creed of "the kingly way is upright" and "honesty is the basis, and no deception is given to children or the elderly". It is famous for its remarkable curative effect, genuine goods and fair prices. De Ren Tang was founded by Mr. Le Daren from Beijing, who came from a medical family, in Chunxi Road at the beginning of the last century. Because its shop sign had the same name as "Chengdu Chen Tong Ren Tang", it was renamed "Da Ren Tang". In 1948, it was renamed "De Ren Tang" and has been in use ever since. In 1745 (the tenth year of Emperor Qianlong's reign), Chengdu Tong Ren Tang proposed the theory of "if food therapy does not work, then use medicine", and opened a medicine department with "food therapy, medicinal porridge, medicinal wine, etc." as auxiliary treatment. In 1980, Chengdu Tong Ren Tang further developed the medicine department, established the medicine department in the form of an independent enterprise, and renamed it "Imperial Palace". "Imperial Palace" is the earliest catering enterprise in my country with medicine as its theme. Information source: Chengdu Intangible Cultural Heritage Protection Center Information source: Chengdu Intangible Cultural Heritage Protection Center