Was there alchemy in ancient China? When was it introduced?

When personal wealth and power reach a certain level, the upper class will naturally pursue immortality and more wealth. China alchemists believe that matter can be changed, and manual exercise can shorten the time and accelerate the change. Naturally, alchemist Li and Luanda claimed to be able to make "gold" with cinnabar during the reign of Emperor Wu of Jin, and Liu An, the king of Huainan, claimed to be able to make gold and silver with mercury. At the end of the Western Han Dynasty, Liu Xiang made gold according to the secret recipe left by Liu An, but he failed.