1. Guiguzi is an accomplished man with a long life. We all know that Guiguzi has four apprentices, namely Sun Bin and Pang Juan, Su Qin and Yi Chang. Sun Bin and Pang Juan are two outstanding military strategists at the same time. They basically appeared around 350 BC. Guiguzi was also a good friend of Sun Bin's ancestor Sun Wu, and his main activity time was Gou Jian period. Guiguzi was also a good friend of Mozi, who was born in 468 BC and died in 376 BC, while Zhang Yi and Su Qin appeared around 300 BC. Guiguzi wanted to accept Zhang Yi and Su Qin as apprentices, so he stubbornly lived from 500 BC to 300 BC, at least for more than 200 years.
Second, Guiguzi may be a Taoist in Li Er. According to records, Guiguzi is a master of Taoism. Then the Taoist school was founded by Li Er in the Spring and Autumn Period. I haven't heard from you since Li Er. It is possible that I hid and set up an organization in the name of Guiguzi.
Guiguzi may not be a person, but the head of an organization. It is almost impossible for a person to live to be over 200 years old, especially in ancient times when conditions were not very favorable. So Guiguzi is not a person's name, but an organization's title. For example, the leader of Mohism is called a giant, and the leader of Guiguzi is called Guiguzi.