2, explanation: eight two: that is, half a catty. One and a half Jin, one and a half Liang. The metaphors are the same.
3, from: Songshi Puji's "Five Lights Meeting Yuan" Volume 11: "Q:' When I came, I was empty and lost in two ways. How can you not be fascinated? "The teacher said,' The head of the scale is half a catty, and the tail is eight taels.' Zhong Jian Guo Jing Deng's Continued Recording of Turquoise and White Light: "The treadle scale is as hard as iron, and it is eight or two yuan and a half Jin. "
4. Example: People will look at his two skills, which are almost the same, and his clothes are similar.