HeHello @Lin Zhao,
Hello @Lin Zhao,
welcome to this moderated Azure community forum.
I tried to create an IoT Hub in China but it was not listed for me (probably because I need another agreement).
Then, I checked the documentation but China is not mentioned there. So no limitations are documented.
Finally, I checked the availability:
It seems the IoT Hub is available in multiple regions but the Device Provisioning service only in a few of them.
The Azure Device Update service is not available in China.
If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.