Yongzheng was very interested in the Taoist elixir. Yongzheng was very interested in the Taoist elixir and left the Taoist priest in the palace to prepare the elixir for him. He personally wrote several secret books, and sent a special message to some local confidants: "Pay attention to visit and reach out to the people who fix their lives or Taoist priests. If you can find it, you must be patient and give a large sum of money to settle his family. Be polite to me and send a car to Beijing quickly. " I am very useful. I will definitely ask and interview extensively and try my best to find it for me. "In order to dispel the doubts of ministers, he also said," I don't blame even if the people sent are incompetent. "I have my own test method." How dare ministers neglect such an imperial edict? They recommended Taoist priests to Beijing. Among these Taoists, he praised Ziyang as a real person, saying that his book "Five Needles Palm" clarified the true meaning of the elixir and was called the "immortal". Yongzheng also wrote many poems praising Taoist priests for collecting herbs, refining alchemy and releasing cranes. In his royal collection of poems. There is such a poem describing an alchemist: "sand is introduced as medicine, and pine and cypress go around the cloud altar;" The furnace contains yin and yang fire, both inside and outside. Radiant, the spirit protects the dragon; "I feel that the fairy is ripe and the sky is purple." Draw a vivid picture of the court alchemy. Yongzheng took Dan medicine, in addition to treating diseases, it is more important to replenish Ji Dan's vitality, and never stopped. He once gave Ji Dan to his confidant E Ertai and Tian Wenjing. It is said that Ji Dan is "elaborately refined, and the effect is very different whether it is hot or cold. It is indeed a beneficial and harmless drug. Although you take it boldly, don't doubt it. " On August 23rd, 13th year of Yongzheng, Yong Zhengdi died. Only one day after Yongzheng's death, that is, on August 25th, the new king Qianlong issued a decree to expel Zhang Taixu, Wang Dinggan and other alchemists from the palace, calling them "street hooligans, and it is best to make trouble by spreading rumors". All the raw materials of an alchemist will be removed from the palace.