You must select a bank and have an account with them, then ask for instructions to do an electronic wire transfer of money, and at least Bank of China has a card printed with them in English. 

The bank in UK will need your full name as shown on your passport, your account number at the Chinese bank, their name, address and branch swift code, maybe their phone number also.  It will take from 7 to 10 days to arrive, and the local bank will phone you when it does.

I think you might mean an IBAN number - aka International Bank Account Number. This is your bank's individual code which, according to international agreements, allows your bank to be recognized be any other bank in the world. Each bank has a unique code, which makes transferring funds into the right place much easier, given the tens of thousands of banks in the world.

The other thing they should ask you for is a SWIFT code for your bank - ask your bank for both and you should have no hassles transferring money.

Thank you both for your help. I'll get on that.