"You can earn miles throughout the entire
Air China international route network. This also applies to Air China flights to and from Hong Kong, Macao and Taiwan.

You can also earn miles on the following domestic routes operated by Air China:

Peking - Shanghai v.v.
Peking - Xian v.v.
Peking - Dalian v.v.
Peking - Chengdu v.v.
Peking - Nanjing v.v.
Peking - Hangzhou v.v.
Peking - Guangzhou v.v. "