Treatment method of wall cracks
Wall drying method
When the wall is completely dry, it is estimated that it is impossible. Here's a suggestion. You can buy several light bulbs with large wattage, connect temporary electricity, and bake the wall with light bulbs, but stay away from them, otherwise the wall will be very dark.
Bandage repair
If there are cracks, you can put a bandage on the crack, or kraft paper or dacron cloth, and then scrape the surface with putty. Scrape when it's dry.
Dry grass roots
The crack you mentioned is because your base is not completely dry, because it dries faster than the outside of the base, so when it dries outside, it will naturally crack inside.
comprehensive utilization
Generally, white and latex paint will have certain elasticity. As long as the cracks are not too big and serious, it should be no problem to put on bandages. However, it is recommended that you use 1 with 2.