What does a ruler mean? A ruler explained.

1, ruler, wooden board used by teachers in old private schools to punish students. Also called a ruler, it is made of two pieces of wood. The two trees incline upward and downward. The upturned person is seven inches and six minutes long, six minutes thick and one inch, and there are wisps of faces on the four sides below. The person leaning on the top is seven inches and four minutes long, five minutes thick and one inch thick, and there are wisps of faces all around. Put up a wooden buckle in the middle of the upper wood, which is two inches and five minutes long and seven minutes high. Grab the button and knock on the wood below. This ruler is used in rituals such as "conversion, shaving, preaching, speaking" and "eating in the mouth of yoga".

2. The Buddhist tutor told the monks about the instruments of abstinence. Two rectangular Xiao Mu, one inclined upward and the other inclined downward, with slightly larger inclined wood, make a sound by knocking with the inclined wood. "Baizhang Qinggui Mishadedu": "Set up several tutors, break up with the abbot, and install incense sticks, hand stoves and rulers."