Beginning of spring, Changxia, beginning of autumn and beginning of winter are divided into Changxia from beginning of autumn to beginning of autumn, Liver from beginning of spring to long summer, Heart from long summer to Liqiu, Spleen from Liqiu to Liqiu, Lung from Autumnal Equinox to Lidong and Kidney from Lidong to Lichun.

Spring-like liver-the five elements in spring belong to wood, and the five livers correspond to the liver, which means that the yin is deficient in yang: in spring, the yang is gradually born, and everything is revived, generally referring to things that have the functions of growth, hair growth and relaxation. The liver stores blood, governs the drainage, the absorption and the ascending, so there is a saying that the liver uses yin and yang, which is called "the official of the general" among the twelve officials.

Nourishing the heart from summer to the sun-the five elements in summer belong to fire, and the five internal organs should be in harmony with the heart, and the heart is the day of yang. In summer, the sun is the most abundant and grows rapidly, which generally refers to things with temperature rise function. Heart governs blood and hides spirit, which plays a leading role in life activities, so it is called "the official of the monarch" among the twelve officials.