Bonsai pruning should be neat, not sloppy, and the incision should be smooth, clean and ingenious. Flat refers to the smooth and clean incision, and refers to the clean cutting. Skillfully choose the cutting position and its angle, generally 45 degrees, so as to make the wound heal as much as possible and eliminate artificial marks.
In bonsai pruning, in addition to common thinning, short cutting and fine cutting, the so-called fine cutting is to completely reshape the branches according to the modeling intention. Here is a formula: "One branch should be tortuous, two branches should be long and short, three branches should gather and disperse, and four branches should be dense", so as to achieve the artistic aesthetic effect of uneven levels, dense and natural vitality!