Can anybody help me with explaining the geographical structure or surroundings of Guangzhou?

Firstly, I'd like to tell you the specific location: South-central Guangdong Province, Pearl River Delta, Southern China.
The terrain varies to low-altitude along the direction of northeast to southwest. In the northern and northeastern area are the coteau and amountainous areas. In the middle area, it is plateau and the alluvial plain in the south.