Later, he also became a doctor in Kyoto, and continued his practice and verification, which was also affirmed. In the 60th year of Kangxi (172 1), old visitors returned to Shiyang (now Hanyang), Hubei Province, and borrowed the full text of this book to copy again. Two years later, in the first year of Yongzheng, an introduction was added. It is clearly stated in the article that it is a great pity to put it in Fu Zi in the future in order to avoid being forgotten. The title will be "The Secret of the Unknown Scholar's Liver Capsule" and "I don't steal the empty voice, take it for myself ..."
There is indeed Wang Dade in the celebrity dictionary of traditional Chinese medicine, and the times are roughly the same. I also have some works that have been handed down to later generations, but I didn't mention the secret of Youth Capsule. It can be seen that Wang Dade is not a native doctor in Shan Ye, but a Confucian doctor who has seen the world with superb medical skills and medical ethics. There is no record of "the secret of youth capsule" or "the secret of youth capsule of unknown scholar" in dictionaries such as Medical History of China, Collection of Rare Medical Books and Examination of Medical Books in China Provinces. On this basis, the author preliminarily speculates that Wang Dade's wish has not been realized, and this book has not been handed down from generation to generation by Fu Zi, but this manuscript has been circulated. Until modern times, there are small words written in pen and blue ink between the lines, which is enough to show that its modern protagonist is also learning and using it.