Introduction to Pilu Hall: The back hall is Pilu Hall. It is popular among the people to count Arhats to determine good or bad luck. That is, starting from any Arhat, count to the last Arhat according to your age, and then draw a seal according to the number of the Arhat. One piece to measure good or bad luck. However, the words of the signature have been modified, and most of them are mainly exhortations to be upright and do good deeds.