Sectional trigram is a different trigram. "Sets" means moderation. The code for the hexagrams is 6:21, the main hexagram is 6 hexagrams Dui Gua, the hexagram is Ze, the characteristic is pleasant; the guest hexagram is 2 hexagrams Kan Gua, the hexagram is Water, the characteristic is danger and difficulty. The main party is enjoying the success of the pleasant, while the guest is in difficulty, the main party should help the guest through difficult times, or take advantage of the guest's difficulties in the expansion of the opportunity, the main party must be carefully considered, there should be appropriate restraint, otherwise, there will be losses.2. In the left diagram, the red color indicates that the lines in position, the azure color indicates that the lines in the wrong position, and the arrow indicates that the arrow should be. The Sectional Gua is the 60th hexagram of the 64 hexagrams of the I Ching. Water and Ze Festival (节卦) everything has a festival. This hexagram is a superposition of different hexagrams (lower Dui and upper Kan). Dui is water and Kan is water. Ze has water but the flow is limited, more will be overflowing outside the zephyr. Therefore, there should be moderation, so it is called section. Sectional trigrams and lax trigrams are the opposite of each other, as a combination of trigrams, and are used interchangeably. Heaven and earth can only be new if there is moderation, the country can only be stable if there is moderation, and the individual can only be perfect if there is moderation.