Paypal payment page layout broken in webview android maybe css not loaded correctly?

As kadhirvel mentioned in his ask (Paypal payment page layout broken in webview android)

And this (https://www.paypal-community.com/t5/About-Payments/paypal-Android-webview-layout-issue-on-payment-page/td-p/807164).

We both can't load paypal payment page correctly, but messy layout showed up.

I guess that if css files cannot be loaded or some other questions.

I also come with this problem.

Can any one do me a favor?

PS: I'm in China, and the page of Alipay can showed up correctly but paypal.