There are three doors in Area B: the main entrance, the back door (to Shayang Road) and the small door (to go out is the snack street, opposite to Shapingba Primary School, located in Zheng Sha Street).
There is only one door in Area C (Chen Jiawan).
I have been living in the old campus,
I have only been to Huxi Campus twice. I remember there are two doors, one is the gate, the other is in the commercial street, and the other is the small door.