Dear @luluhu
I am able to view your Website on both Chrome and Safari, are you using a different Browser?
It did take a little while for the cover page to load.
Wordpress, Lay Theme & Laytheme's Addons are all up to date?
Any Custom CSS or JS that may interfere is temporarily removed.
Any third-party plugins de-activated to see if this resolves the issue.
License key not activated - (in website blank situations or button not available)
Seasons Greetings and Best wishes
Richard