What should I do if the putty on the outer wall is pulled up by American paper?

In principle, it is to shovel off the putty layer and redo it.

This situation may be that the textured paper is too sticky, and it will stick to the primer when it is torn. Secondly, it may be that the permeability of the primer is not enough to penetrate into the putty base of the external wall. Third, the construction can be started before the primer is completely dried.

It is recommended not to use putty that has not been used on site. If it is not used, it must be watered and cured once after scraping, and then coated with a transparent sealing layer.