<-- I -->
bej_1 bej_2
bej_3 bej_4
shanghai_10 shanghai_11
bej_7 shanghai_7
suzhou_1 suzhou_2
suzhou_3 suzhou_4
guangzhou_1 guangzhou_2
guangzhou_3 guangzhou_4
guangzhou_5
shanghai_5 shanghai_6
bej_6 shanghai_9
bej_5 shanghai_17
shanghai_14 shanghai_16
shanghai_15
artm_3 artm_4
artm_5 artm_6
artm_1 artm_2
shanghai_1 shanghai_3
shanghai_13 shanghai_4
shanghai_8 shanghai_12
shanghai_2