Let the students look at the word webs. Make sure the students know the meaning of these words. Then let them talk in pairs about the different kinds of land. Allow them enough time to write down the sentences in their notebooks.
A sample version:
Some parts of southwestern China has a very beautiful landscape with green hills and mountains, some parts of northeast are covered with thick forests. In the west there is a large area of deserts. But in cities, there is not enough grassland because of a large population.