Immigrants of Sophora japonica in Hong Tong, Shaanxi Province

To correct it, the landlord said that immigration occurred in the early Qing Dynasty. Because the Qing army was chasing Zhang He and fighting Nanming in Tuchuan River, Zhang was killed, and more than 90% people in Sichuan were killed. Later, they had to emigrate from Hunan, Hubei, Fujian and Guangdong to fill the population gap. This is the famous "Huguang filling Sichuan" movement in history; As for the migration of Sophora japonica in Hongdong, it happened in Yongle period of Ming Dynasty. The peasant war at the end of Yuan Dynasty mainly occurred in the Central Plains, and the population of Hebei, Henan and Shandong decreased sharply. Although there was a recovery during the Hongwu period, there was a three-year war between the Prince of Yan and a large number of immigrants from Shanxi to Shandong. As for whether anyone is missing, that's for sure, because immigration is compulsory, and soldiers are watching along the way, but some people still flee halfway. Later, I thought of a way to tie a certain number of people's hands behind their backs with a long rope and string them into a line. Sure enough, fewer people fled, but everyone had different constitutions, so many people died. There is also an allusion from this, because it is convenient all the way, so you must untie the rope in your hand, that is, go to the toilet at this time, which you call "relieving yourself."