1, Lu
Wu Helu is a feud. According to legend, in the Song Dynasty, a scholar named Lu became famous in the Song Dynasty. Finally, he became prime minister, but after retirement, he was framed by an official named Wu. The official named Wu made some slanderous remarks in front of the emperor, which made Lu's family uneasy, almost ruined, and finally fled. From then on, Wu and Lu became enemies, and their descendants no longer married.
2. Mu and Mu
Mu Ying was a founding hero of the Ming Dynasty, and Zhu Yuanzhang adopted his son. After pacifying Yunnan, Mu Ying stayed in Yunnan to guard. After Mu Ying's death, Mu's descendants passed on from generation to generation, guarding Yunnan until the end of the Ming Dynasty. Later, the Qing Dynasty stepped onto the historical stage. After the Qing army entered Yunnan, Mu Tianbo, the last duke of Guizhou, personally escorted Emperor Li Yong to Myanmar and died in battle. Mu Ying's direct descendants had to go to Wu Sangui to save the family.
However, during the period of putting down the rebellion in Yunnan, the descendants of Mu had many contacts with the rebels, and were finally arrested and executed by Wu Sangui. Since then, they have made deadly enemies with Wu. In order to survive, many descendants of Mu Ying had to change their names to "Mu". It was once an open secret that Mu changed his surname to Mu. In Yunnan, as long as you say your surname is Mu, many people will unceremoniously associate you with Mu Ying's descendants.