Chen Yifeng judged the relationship between the number of Long Mai knots and algebra in Yinzhai.

I don't know the relationship between the number of Long Mai knots and algebra in Yin Zhai. Long Mai refers to the rolling mountains. In ancient geomantic omen, five geographical strategies were first advocated, namely, seeking dragons, seeking sand, watching water, acupoints and standing still. Dragon is the geographical context, soil is the meat of dragon, stone is the bone of dragon, and vegetation is the hair of dragon. Looking for dragons, we must first find the mountains of ancestors and parents, judge the pulse, don't be angry, and divide yin and yang.