What are the allusions of Deng You leaving his nephew and abandoning his son?

Deng You, Minister of the Eastern Jin Dynasty, was born in Xiangling, Pingyang (now Xiangfen, Shanxi). Successive western Jin Ruyang, Hedong satrap. In the Eastern Jin and Yuan Dynasties, Wu Jun was an official satrap, and his punishment and politics were distinct. Because of the unauthorized opening of warehouses for disaster relief, it was disintegrated by Huan Yi and others, but it was loved by the people. The final official is Shangshu, and the right servant shoots. At the turn of the Jin Dynasty, at the end of Yongjia, there was a rebellion in Shile, and Deng You fled with his son and nephew. Lu Yu is a thief. He can't run away with two children at the same time. Thinking that there was only one nephew left in his dead brother, he had to save his life anyway, so he abandoned his own son and fled to Jiangdong with his nephew. Deng You has no children since then, and people at that time said indignantly, "I don't know justice, Deng Bo has no children!" "