压大单小单大双小双技巧

简介：Historically, Shandong General Liu Zeqing took this route to rescue Kaifeng. Liu Zeqing crossed the Yellow River to establish a camp and tried to transport grain and rice to Kaifeng, but failed. When they returned to the north bank, the officers and soldiers fought with each other, and one-tenth of the people fell into the Yellow River and drowned.