How to repair the cracks on the wall and how to do it?

Find out the root cause of cracks, shrinkage cracks caused by wall slotting and slot ash filling; Because the stress cracks caused by uneven plastering and putty scraping during construction are unpredictable, the cracking problem is by no means so. Before painting, the house has different settlement cracks. Tackle the symptoms and cure the root cause: shovel off the plastering layer, then hang the barbed wire, then plaster, then blow the putty, and then make the wall.