After Ge Hong's time, which Huangdi was attracted by the story of the elixir of life?

After the era of Ge Hong, the story of the elixir of life attracted many emperors. In order to prevent aging, Emperor Ai of Jin indulged in taking elixir of life and died of poisoning at the age of 25. Tuoba Wanggui, Emperor Wudi of the Northern Wei Dynasty, set up a fairy workshop in the capital for three years in Tianxing, "setting up a fairy doctor and cooking a hundred kinds of medicines", and "making condemned prisoners try clothes, which is not their own heart, and many die without testing." However, Tuoba Silicon did not lose heart. "And the officials who refine medicines are still emerging one after another." It was not until several years later that it was ordered to stop because there was no result. However, after taking Wushi Powder, Emperor Daowu finally went insane and died. Taizu Tuoba Tao called Wei Wenxiu, who lived in seclusion in Gaosong, to the capital and asked about the alchemist at that time. He also sent ministers Cui Re and Wei Wenxiu to Wuwangshan, but failed. Later, he ordered Luo Chongzhi to visit immortals in the mountains, but failed. During Emperor Xiaowen's reign, Xu Jian, the imperial adviser, hoped to make elixir for Emperor Xiaowen and realize the "method of prolonging life", so he moved to Gaosong to collect elixir, but after several years, he failed and finally gave up the plan of elixir. Wen Xuandi of BAIC was more cautious at that time. "History of the North, Art and Literature" said: "There was a long-distance traveler who ordered him to join the warlock nine times and turn to the elixir during the propaganda. And then, the emperor put a cloud in the jade box:' I am greedy for happiness on earth, and I can't fly to heaven until I die.' "So although he ordered refining then, but refused to take at ordinary times.