Five elements and three family problems

Five elements and three schools are Taoist terms and are related to alchemy. Jin Mu's five elements of fire, water and soil correspond to human lung, liver, kidney, heart and spleen. Taoism divides the five elements into three groups: heart and lung, liver and kidney and spleen, which are called three schools. Three raw materials corresponding to an alchemist: lead, mercury and fesr. Heart and lung: a group of lungs lose the yang of heart fire, so it is called ignition, and heart fire retreats to yang and produces yin gold; A group of liver and kidney, liver, is definitely the yin of kidney water, so it is called yin (the word "yin" is uncertain), and kidney water retreats from yin to produce yang wood; Then the spleen is harmonious, and the five internal organs are all involved, and the Tao becomes immortal.