How to explain the "salty" in the "salty hanging" of kites in junior high schools in Bao Qingtian?

Saltiness is an unintentional feeling. Although it was unintentional, it was induced. The next sentence is: quite, it is unintentional love, although unintentional, but in love.

Here are the relevant lines:

Xiao Man picked up the hexagrams.

M: What does that mean?

Bao: changing money up and down is a salty divination.

J: What does this mean?

Bao: Yes, it means girl, and gen means boy. Yin and Yang attract each other. And this salty, is the feelings of its inner feelings, so this is also an unintentional induction, unintentional encounter.

..... (There is an irrelevant paragraph)

Policy: Until now, the intention to stop is unintentional induction. Maybe it should stop here.

I like playing the Zheng very much!