Because in ancient times, it was a woman's ornament, that is, a woman's headdress, so she would decorate it with jewelry and the like, so it can also be used to describe a woman's beauty. Therefore, under such conditions, people summarized the appearance of Hu Sanniang.
In fact, a post is not a summary of Hu Sanniang's height, but also refers to Hu Sanniang's weapon, that is, its red cotton lasso is as long as a post, which is a summary of its most typical characteristics, and it was also recorded in the Water Margin at that time. In ancient times, green was actually used to indicate that a person was very young, or that this woman was very young, so the green post mainly meant a girl who lassoed ten feet of red cotton.
Of course, in ancient times, Zhang was used to name a poisonous snake, which was very fast and toxic. Therefore, Hu Sanniang is a vicious person who kills people on the battlefield without blinking an eye. Therefore, using Zhang to describe Hu Sanniang is actually a generalization of her militancy and personality. At that time, people used timely rain to describe Song Jiang, because Song Jiang would appear in time when people needed him. Therefore, Zhang Yong should refer to the general meaning of Hu Sanniang's main characteristics.