China uses only one standard time, i.e. Beijing time, throughout the country.
Money exchanges by cash or traveler's cheques can be made at the branches of Bank of China at Beijing International Airport, hotels and tourist stores. Please remember to keep the currency exchange receipt with you as it has to be shown to the bank clerk if you are going to convert the remaining amount of RMB back into foreign cash when leaving China. But note that not all these currencies are accepted at some small money exchange outlets. Credit cards such as American Express, Diners Club, JCB, Master and Visa are acceptable for payment at hotels or tourist stores. But it is difficult to draw cash with credit cards.