We don't offer IP addresses in China. Our available deploy regions are US West (California), US East (Virginia), EU West (Amsterdam), and Southeast Asia (Singapore). If your site is being blocked by a regional firewall, that is outside the scope of what we can address, as we don't operate infrastructure in mainland China.

The websites of the other three projects I created can all be accessed directly from the Chinese mainland. However, this one cannot. It seems to be a problem with random IP addresses. Could you please change it for me?

We don't have the ability to change or select the inbound IP address assigned to a service. IPs are allocated by our infrastructure automatically, and there is no mechanism to swap or rotate them. If a particular IP happens to be blocked by a regional firewall, using a custom domain behind a CDN that has presence in your target region would be the typical workaround on your side.

what should i do?

Hi

Have you tried recreating the project.

Hey, since you are on the free plan, try redeploying or delete and recreate the service.

yes, but it doesn't work

I have tried, but it doesn't work.

I would have suggested to change the region of your service, but that isn't an option on the free plan. I am out of ideas in this case if you have already tried everything above.