What do you mean the almanac is not good?

In the Gregorian calendar, bad walls mean tearing down houses and walls.

Wall: 1, wall: city wall. 2, city,: provincial wall (provincial capital). Building a house needs a wall, so a bad wall means tearing down the house and scraping the wall.

"Hee Sa Flat House Book": The bad wall should be broken in the month; Avoid building the moon, hell, robbing evil spirits, disasters, evil spirits of the moon, monthly punishment, lack of the moon, earth symbols, earth bags, and the subsequent use of the earth king.