In order to ensure the effect of paving, wallpaper requires a higher level at the grass-roots level, and it must be flat in the later stage, but neither of these two kinds of blockboards is available. A. flatness is not enough. B, later plate will be deformed.

Correct handling method:

A, joinery board outside gypsum board.

B, blow be bored with child, ensure smooth.

C, paste wallpaper.