What are the topographical features of the 16th National Congress of the World?

There are five basic types of terrain in the world:

Mountainous area: The altitude is generally above 500 meters, which fluctuates greatly.

Plain: generally below 200 meters above sea level, flat and open.

Basin: low in the middle and high around.

Plateau: the altitude is generally above 500 meters, the original surface is relatively flat, and the surrounding area is relatively steep.

Hills: The elevation is generally 200-500m, with gentle fluctuation.