Brief introduction of Liao gan

Polygonum hydropiper is an ancient folk custom, which is prevalent in many rural areas in northern China. But when it originated, what was the initial focus, and what was the connotation and extension of its later evolution, there were different opinions, which was confusing for a while. Therefore, studying and studying it, excavating and sorting it out will help us to know more about our national culture, help us to select the best from the rough, and let the positive significance of this traditional custom inspire us to keep forging ahead.