What is the relationship between caisson ceiling and degraded ceiling and flat ceiling?

It's just that the decoration is different, and they all belong to the ceiling.

Simply put, you think of the ceiling as the ground.

The caisson ceiling is to dig a hole in the ground, the degraded ceiling is to make several steps on the ground, and the flat ceiling is to make a flat ground.

Then you install these effects on smallpox, that's what it means. The most economical is definitely the flat plate, and the most expensive is the caisson.

You can input these words into Baidu pictures, which is very simple.