Police in Pingyao

Public Security Bureau

Next to the Píngyáo fire station on Yamen Jie, also known as Zhengfu Jie. You cannot extend visas here, but you can in Tàiyuán (although it takes seven working days).
ATM in Taiyuan

Agricultural Bank of China

ATM next to the Jǐnlín Oriental Hotel.
Police in Taiyuan

Public Security Bureau

Can extend visas, but be warned they need seven working days to do so.
Police in Datong

Public Security Bureau

In the southwest of town, close to Dàtóng Bus Station.
Post in Pingyao

China Post

Handily located at the centre of the old town.
Post in Datong

China Post

A short walk south from the Garden Hotel.
Bank in Pingyao

Industrial & Commercial Bank of China

ATM just west of the old city wall.
Bank in Taiyuan

Bank of China

For foreign exchange and ATM.
Post in Taiyuan

China Post

Opposite the train station.
Post in Wutai Shan

China Post

South of the bus station.