For those who are planning to go to China, be aware of some nice chinese people who would introduce themself asking for a little english practise. After a little chatting they will ask you to join them to have some tea, food or something like that. If you agree to do it, you will find yourself with a very big bill to pay (30-50 euros) in a country where you can eat lunch or dinner for 3-4 euros.
Really, they seem very very nice so be aware of that. They are always in the most turist places