In the past, Confucius said that "three people walk together, there must be my teacher", and it is not necessarily from the positive side, but on the negative side, it can be used as a lesson.
The meaning of Confucius' saying 'When three people walk together, there must be my teacher' is not necessarily based on the positive side, but on the negative side, it can also serve as a warning.
In the past, Confucius said that "a threesome must be a teacher", and it is not necessarily from the positive side. On the contrary, on the negative side, there is no way to learn from it.