origin
During the Spring and Autumn Period, Confucius led students to study in various vassal states. Because Confucius was a conservative, he was incompatible with the hegemony of the princes at that time and was often given a cold shoulder. Once Confucius was separated from his disciples, and Confucius was in a daze by the east gate. Zi Gong asked the Zheng people where Confucius was. Zheng Guoren said that there was an old man standing in a daze by the east gate like a lost dog.
In the second year (Confucius was 59 years old), Confucius left Wei, passed through Cao, Song and Zheng, and went to Chen, where he lived for three years. When Wu attacked Chen, the war broke out and Confucius left with his disciples. When the Chu people heard that Confucius had arrived at the junction of Chen and Cai, they sent someone to meet him. The doctors of Chen and Cai knew that there was something wrong with what Confucius did, and they were afraid that Confucius would be reused in Chu, which was not good for them. So they sent laborers to surround Confucius and his disciples in the middle of the road, not relying on the village in front or the shops behind. After eating all the food they brought, they were deprived of food for seven days. Finally, Zigong found the Chu people, and Chu sent troops to meet Confucius, so that Confucius and his disciples were saved from death. Confucius returned to Weiguo at the age of 64. With the efforts of his disciple Ran Qiu, he was welcomed back to Lu at the age of 68, but he was still respectful.