Hi @TomLu1231 ,
Do you mean that your app runs slowly in china?
Yes, it indeed has this problem.
As we all known about China's Internet policy, it restricts access to foreign websites.
So currently you could only visit powerapps from Office 365 ( Office 365 operated by 21Vianet (China) ), which runs not so fast.
There's no very good solution to improve this.
Maybe you could consider use VPN to pass the firewall. In foreign websites, your app may run more fast.
Best regards,