I met a crew in a falcon having a nightmare with the refuellers who didnt actually realise that the guys on the ramp werent their handlers - the handling agent couldnt come airside and they were arguing with the Capital Jet facilitator. Lots of rules in China, not much flexibility.. I realise you can stop without a visa but it puts you in a crappy positon if plans change and you have to position out on an airliner..