Best way to take money out of China for travelling?

I am a UK citizen who has lived and worked in China for 18 months. I have bank accounts in both countries, but will not return to the UK for some time. I now plan to travel in Thailand & Indonesia, funded from my Chinese bank account. Can you advise what is the best way to carry money? Can I buy traveller's cheques in China, and in what currencies? Can I get a prepaid debit card?