It is a good type to split into two parts, and it is not afraid of the other party's infiltration, especially in the preface stage. Infiltration often helps you to go thick, which should be what you want. After entering, there are two ways to deal with it: up and down. Anyway, white is not bad, even slightly better. Please see the figure below for details:

Above 1, the white color is thick, with 8 meshes, and the white color on the corner can be ordered at any time. This number is the best result of white; In the second picture, the white sequence plate stage won a valuable first hand and the horn still has flavor, and the white one is better.

Bottom-up diagram 1: This diagram shows the formation of white 7 from bottom to top, with extremely thick white and rich black, with two points;

Figure 2 below: If black is pulled out, white is not only thick and oppressive, but also the corners can be hollowed out at any time, and white is excellent.