1. The meaning of entering the spirit and retreating from the spirit
The meaning of entering the spirit: refers to the fact that the five elements remain unchanged and the earthly branches change to the subsequent earthly branches in the antegrade order, specifically as follows: Haihuazi, Yinhuamao, Sihuawu, Shenhuayou, Chouhuachen, Chenhuawei, Weihuaxu.
Those who enter the spirit indicate that things are constantly moving forward, such as the arrival of spring, green grass and trees, and a sense of vitality.
The meaning of retreat: means that the five elements remain unchanged and the earthly branches change to the earthly branches before them in retrograde order. The details are as follows: Zi Hua Hai, Mao Hua Yin, Wu Hua Si, You Hua Shen, Chen Hua Chou, Wei Hua Chen, Xu Hua Wei.
The person who retreats from the spirit is a manifestation of things changing and regressing, such as the signs of fallen flowers and leaves in autumn. Transformation, evolution and retreat can be divided into joys, taboos, misfortunes and blessings. It is better for auspicious gods to meet with transformation and advancement, and for auspicious gods to retreat.

Pay attention to the Six Yao of Tianji, learn the Book of Changes, and not be confused!
2. Characteristics of advancing and retreating from the spirit
Among the five elements, only soil is a little more complicated to change, because the other four elements of the five elements only have two earthly branches, such as wood. The changes in Jinshen start from Hai and end at Xu, in antegrade order. The changes in retreat start from Zi and end at Chou, in retrograde order. Therefore, the transformation of Xu into ugliness cannot be said to be the advancement of the spirit, and the transformation of Xu into ugliness cannot be said to be the retreat from the spirit.
2. Cannot jump. can be used to uglify Chen, but not Wei.
talks about the role of entering the spirit and retreating from the spirit. " Addition and Deletion Bu Yi " says: "Those who enter the spirit advance from this, like the glory of spring trees, spring water, and the image of eternity; those who retreat from the spirit gradually retreat from this, like flowers and trees in autumn, gradually withering." The author believes that those who enter the spirit symbolize a certain continuity and growth of power in a certain direction; conversely, those who retreat from the spirit symbolize the decline of power in a certain direction. However, everyone needs to pay attention to the fact that recession does not mean that there is no recession. What stands out is the direction of change. Therefore, Li Wenhui named it "the glory of spring trees" and "autumn flowers and trees", which emphasizes the directionality of its development and change, and does not mean that it is currently flourishing or withered. 
3. The specific situations in which entering the spirit and withdrawing from the spirit play a role:
The four situations in which moving Yao transforms into entering the spirit:
① When the moving Yao is prosperous, it becomes prosperous and advances;
② When the moving Yao is resting, it becomes resting, and it will be transformed when the time comes;
Four situations of moving and retreating:
①Those who take advantage of recent events and do not retreat;
② When the Yao moves or changes to the prison, it turns into a prisoner and then retreats;
③ When the Yao moves or changes to the Yao, it has a prosperous phase, and it will retreat when it is time to retire;
④ When the Yao moves or changes, there is a ten-day void or a month break, and it can retreat after filling up or coming out of the moon.