25 30
Urumchi
Sining
Lanzhou
Hohhot
BeiJing
Tianjin
Shenyang
Changchun
Harbin
Dalian
Xian
Zhengzhou
Xuzhou
ChengDu
Wuhan
Shanghai
Kunming
Guiyang
Zhuzhou
Nanchang
Fuzhou
Nanning
Liuzhou
Guangzhou
Shenzhen
1 3
2 3
3 4
3 11
11 12
4 5
5 12
12 13
5 6
6 13
6 7
7 10
7 8
8 9
11 14
14 17
14 18
17 18
12 15
22 23
18 23
18 19
19 23
19 24
24 25
19 20
20 21
16 20
13 16
15 19