another information is wooden cylinders with special patterns and designs, it sticked to the beam at the front door. On the two sides of the front door , you can find...,
when you see the stone drum infront of the temple, that`s mean that temple might being worship one ore many wu officials inside.
from Han Dynasty , they was in Imperial China they had a nine-grade controller system, from Rank 1 - Rank 9, and just the Official from Rank 3 to upper can stick the Cylinders infront of there door , and through out Han Dynasty >> Tang Dynasty >> Song Dynastic >> Ming Dynasty >> Qing Dynastic
they kept it to the end of China imperal.