There are several ways to deal with cracks.
1, carefully wipe the gap with loess mud. The advantage of plastering with loess mud is that it is not easy to crack. This is how the heatable kang in rural areas is plastered.
2. If it is cement plastering, it is necessary to do a good job of health preservation. Drying is not allowed, and it is easy to crack after drying.
3. Lime plastering needs to be mixed with hemp. If it is dry, you can wipe it again with lime slurry.
In a word, different materials are used, and the jointing methods are also different.