What crime did Song Wu commit? Why did Bao cut off his arm?

First, because of personal enmity with Bao, and second, because of carelessness.

Let's talk about the first point. What happened when Bao avenged the killing of his relatives? Although Bao is surnamed Bao, he is a relative of Pan Jinlian. Pan Jinlian is Bao's own sister. Pan Jinlian takes his mother's surname Pan and Bao takes his father's surname Bao. This is admitted by Pan Jinlian himself. The Yu Pei she gave to Song Wu is a family heirloom. A family heirloom has two pieces, one is yes and the other is a bag. At the beginning, in order to avenge Wu Dalang, he killed Pan Jinlian and Bao had a personal vendetta. Of course, Bao Yidao hated Song Wu.

Let's talk about the second and most crucial point. As we all know, Song Wu's power is infinite, and few people are his opponents in the battle. How did he get his arm cut off by a bag with low combat effectiveness? In fact, it was mainly carelessness at first, but he didn't expect Bao to overcome his carelessness, but because of his inner kindness. At that time, when confronted with Bao, Bao thought that he could not beat him, and he was ready to fight to the death. But just as Song Wu was about to start work, he found that Yu Pei on Bao Yi Road was Yu Pei given to him by Pan Jinlian. Once again, when Pan Jinlian told him her brother's name and words, he confirmed that this was Pan Jinlian's own sister.

Song Wu knew that he had killed Bao's own sister, and he was already very remorseful, so he could not kill Bao. So he threw down his knife and decided to let Bao Yidao go. At this time, Bao seized the opportunity of distraction, picked up a knife and cut it on his body. Song Wu therefore broke his arm.