It should be, at least it is easy to try out. But there is no any guarantee that IP will not be blocked or similar. We have no plans for hosting Tyk servers inside China yet.
However, if you consider Tyk Hybrid, or On-premise, it will mean that API servers will be located whenever you want, for example, Alibaba Cloud, and your users in China will have guaranteed access to the API, since servers located insde China.
Hope it make sense!
Leonid, Tyk team