That is all that most people will need when traveling. This is something to read on the plane, to get used to the amounts. When you are actually shopping, carry a calculator. Do the conversion each time you are tempted to buy something. It is so easy to get confused with foreign exchange.
Bargaining is part of Chinese commerce.
Avoid the set price stores such as the Friendship Store and factory stores. If you want to meet people go to the markets to shop for souvenirs. Take your calculator and a sense of fun. Both the shop assistant and you should be enjoying the bargaining. If either of you isn't feeling good about the transaction, walk away.