The registration threshold is Yuan 30,000 per annum.
Non-resident traders operating in China, unlike Europe and many other parts of the world, cannot register for VAT as non-resident traders. If a trader is providing services into China, its local representative or its customer is responsible for accounting and reporting the tax.
It is more usual in China for non-resident traders to form a local company (e.g. WOFE) in order to register for VAT.