Mark the wall with a measuring instrument or ruler first, and aim at the mark when pasting wallpaper.
Second, then paint a large area on the wall, you can brush a part and paste a part.
Third, paste the wallpaper according to the marked marks.
4. Reserve wallpaper for the switch as much as possible, and then cut it with a paper cutter to avoid warping.
Five, where there are bubbles, you can use a scraper to scrape a few times to remove bubbles.