Granite lithology:
Granite hills
2 Granite high hill
3 Granite low mountain
4 Granite Zhongshan
Other lithology:
5 Plain
6 Platform
7 Low hills
8 high hill
9 Low mountain
10 Zhongshan
Low hills: <250 m above sea level
Gaoqiu: 250 to 500 meters
Low mountains: 500 to 800 meters
Zhongshan: 800 ~ 2000 meters
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