In an old mansion, when you enter the gate, you will see a big wall. People should go from both sides. What's the name of that wall?

That's called zhaobi, which is a set of walls set inside or outside the doors of a group of buildings. It faces the gate and acts as a barrier. No matter inside or outside the door, zhaobi is in contact with people entering and leaving the gate, so zhaobi is also called yingbi or zhaobi.

The wall is the necessary treatment of quadrangles, a traditional architectural form of Han nationality in China. Feng shui pays attention to guiding qi, and qi can't go straight into the hall or bedroom, otherwise it will be unlucky. The way to avoid air rush is to put a wall in front of the house. In order to keep the air unobstructed, this wall can't be closed, so it forms a building form facing the wall.

The display wall has the function of preventing wind and blocking the line of sight. If the wall is decorated, it will have the effect of scenery.