Hello @zhanghowe, thank you for supporting us by subscribing to Windy Premium!

When you try to log into the application, is there any error message?

To access your Premium features, follow the steps in this manual: https://community.windy.com/topic/11832/what-to-do-if-you-can-t-access-your-windy-premium-features.
Note that the restoration process has to be followed on the device you originally placed an order on.

If the restoration fails, please, let me know in which step it failed and if there was an error message.