This can depend on how you access to Internet. In my experience a Hong Kong travel SIM is best as everything will be pretty efficiently routed via honkers and uncensored. My home country SIM sucked as everything was routed back to my home country which is an awful round trip if you are trying to access a mainland site or service. If you are on a mainland travel SIM local services should be on par with what you use in the west and a good VPN should be pretty fast (especially if your gateway is honker).