? Yi Shu: Chao Yi? Where two or more parts are combined, we must look at each other and contact each other to avoid lax dispersion. The most common forms are "Zou, Chen, Xiao, Yao, Qiong, Lou, Wan and Zhuan", and there are also "Xie, hoe, storage, Qing, point, comparison, worship and debate", which are quite similar to each other. This is the meaning of "welcoming and caring for each other" in calligraphy.
Rescue? Every word is written in strokes, and it is easy to think of how to rescue the second and third strokes and how to package them. The same is true of the so-called "intention first, literary direction later" in the eight strokes.
Sparse meaning: whenever you write a book, the first pen will fall on the paper, so you should figure out how to deal with the second and third pens. If the first stroke loses power, the second stroke will be remedied immediately. That's what Eight Tactics says: "Intention comes first, writing direction comes later".