ATM in Tàiyuán

Agricultural Bank of China

ATM next to the Jǐnlín Oriental Hotel.
Police in Tàiyuán

Public Security Bureau

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

Bank of China

For foreign exchange and ATM.
Post in Tàiyuán

China Post

Opposite the train station.