Are there any famous temples where you can worship Buddha and ask for a sign?

There is no Amitabha in the south to go to Guiyuan Temple in Wuhan, and Luohantang is an arhat. Each arhat has a different arhat card, and there are different scripts after the arhat card. Although it is not signed, the following script is very helpful as long as you count Lohan respectfully and sincerely and get the corresponding Lohan card.