1, Geng, originally meant as a farm tool for threshing, now refers to the seventh place in Tiangan, and is used as a proxy for the seventh place in sequence.
2. Shen, the ninth branch of the earth, can be interpreted as elaboration and explanation. In addition, the application time is an old-fashioned timing method, which is equivalent to 15: 00 to 17: 00. It is also another name for Shanghai.