Charles Schwab: In Shanghai, Tianjin and Nanjing, ABC/ICBC/BoComm have no issue, a regional bank (forget the name, probably Nanjing Bank) is OK too. There maybe some daily limit, possibly 4000 RMB. I tried 5000 and 6000 RMB at ATM and failed. Rate is good, no ATM fees or foreign transaction fee.