Why is it called relieving oneself when going to the toilet?

Toilet means to go to the toilet. There is also a folklore about the origin of the word "Jieshou". In the process of forced immigration to Jiangxi, Shandong and other places in the early Ming Dynasty, officials tied their hands behind their backs and untied them when they needed to go to the toilet urgently. So later Jiangxi people called the toilet "Jieshou" (pronounced "Gaifei" in dialect). The word "Jieshou" comes from the great immigrants from northern China in the Ming Dynasty. So far, this statement is still widely used in Jiangxi, Hunan, Hubei, Sichuan, Chongqing, Hebei, Henan, Shandong and other places. Because the immigration of the Ming government was mandatory, officers and men tied the immigrants on the road to prevent them from escaping. Binding two arms is called big binding, and binding one arm is called small binding. Not only that, but I am also afraid that they will run away tied up, and the tied people will be tied together with ropes before being escorted to the road. Many people are connected and stop when they want to move. If a person wants to move, it involves a lot, and no one can escape. For the escorted officers and men, it is natural to save trouble, but for the bound immigrants, it is hard. The most troublesome thing is defecation. In order to express the meaning clearly, it is a long story. For example, if a person wants to defecate or urinate, he must first report and say, "Please stop, please untie my hand, I want to urinate." The more people there are, the more times the rope is untied on the road. Officers and men also feel trouble, but this method can't be changed. Then only a few words can be simplified: I want to untie my hands. The listener can understand. Until later settled down, this expression also became an idiom and became synonymous with defecation. But there is still a saying that big hands and small hands are untied, which means defecation. I don't know where this came from. In ancient times, the word "handshake" refers to a pleasant "hand in hand" when friends meet, which is equivalent to a modern handshake. When you leave, you say "that's it". Song and Qin Guan's poems are: "It is more difficult to give up when spring comes, and it is more difficult to stop when the boat comes." That is to say, friends get together in spring, so happy that they are reluctant to leave, but they stop for their friends. But in the Ming Dynasty, this word full of friendship became another meaning. During the Hongwu and Yongle Dynasties in the Ming Dynasty, it was found that many provinces were sparsely populated and sparsely populated, so Taizu and Chengzu repeatedly ordered people from densely populated areas to move to sparsely populated places. However, everyone has the habit of moving, especially the ancients. No one wants to leave their native hometown and move to a strange place to start a business in Xinjiang. At that time, people from Hongdong, Linfen and Pujiang in Shanxi were going to move to Henan, Shandong, Hebei and Shaanxi. Every time I move, there are tens of thousands of people, including family members and relatives, and there is a panic. Therefore, people often flee before they gather on the road. For the word "convenience", Gu Ming thinks that convenience means convenience, which has a general meaning and it is difficult to make a single explanation. Besides going to the toilet, many other things can also be called convenience. For example, we often hear people say that "to facilitate others is to facilitate ourselves", which is a term in our life. I can't walk any further. I want to ask the driver to give me a ride. "Convenient, give me a lift." The driver said, "OK, OK, come on up." This is also convenient. Instant noodles can be eaten with boiled water, which is also called convenience, internal urgency, and convenience in going to the toilet ~ ~ all for the same reason!