I did this trip last May and really enjoyed it. I took £100 of Yuan and changed sterling when I got there but you need to ensure that notes are in perfect condition, no tears, folds or marks, or they will not take them. There is not a lot of time to find a bank but hotels change money at the same exchange rate. Some took travellers cheques but had difficulty in finding a place to change them. Credit cards are accepted at hotels for extras and at big shops and those selling souvenirs. It is a busy but brilliant trip, enjoy it!! Hope this is of some help, John