"Friendship in Guan Bao" refers to who and whose story?

The Friendship between Guan and Bao tells a story: Guan Zhong and Bao are good friends. They made a lot of money doing business together, but Guan Zhong kept more than half of it himself. Bao's friend said to him, "Guan Zhong is so selfish and forgetful that he doesn't deserve to be friends with them." Bao said with a smile, "Guan Zhong's family is poor, and he has an old mother to serve him. Since they are friends, they should be like this. " For thousands of years, this story is still very touching to read, their friendship is amazing, and Bao's tolerance for his friends' shortcomings also makes people feel a lot. Since ancient times, there has been a saying in China that "to err is human". People inevitably have shortcomings, but what is important is how to treat others' shortcomings. Bao Shu Ya said from the heart before he died: "My parents who gave birth to me all know Bao Shu Ya." What makes Guan Zhong regard Bao Shu Ya as important as his parents? It is this broad mind that makes friends feel a little warm under the helpless cloud and see a glimmer of light in the dark. In real life, we should also learn to be tolerant, and understanding the shortcomings of others is also an improvement of our personality. Tolerance of others is also a warning to us, and we can't care about it for a little thing. "Bear calm for a while and take a step back." I hope everyone has two pockets, the first one is full of tolerance, which is for others; The other pretends to be humble and prepares himself.