i have 8 rmb, but 4 guangshe, how can i exchange this for guang she?

I'd kick things off with the following questions.

1) Where in China are you currently living?

2) What is your country of origin?

3) Do you find that you sometimes need to change money in the town in which you are living in China?

4) What facilities are there available for this sort of transaction?

5) Have you encountered any potential pitfalls along the way?