Lu Mao (died 239), courtesy name Zizhang, was a Chinese politician of the state of Eastern Wu during the Three Kingdoms period of China. He was a younger brother of Lu Xun, a prominent politician and general who served as the third Imperial Chancellor of Eastern Wu. Life Lu Mao was a younger brother of Lu Xun. His ancestral home was in Wu County, Wu Commandery, which is in present-day Suzhou, Jiangsu. At a young age, he was already known for being a keen learner and for valuing righteousness. Some of his friends – Chen Rong (), Puyang Yi, Jiang Zuan () and Yuan Di () – were from humble backgrounds but had great ambitions. Lu Mao, who was from a more affluent family, often shared his wealth with them. Xu Yuan (), who was also from Wu Commandery, moved to Kuaiji Commandery. He had never met Lu Mao before, but before his death, he wrote to Lu Mao and requested Lu to help him take care of his young son. Lu Mao obliged, had a proper tomb constructed for Xu Yuan, and adopted Xu Yuan's son. Lu Mao's second cousin-uncle, Lu Ji, died early, leaving behind two sons and one daughter who were still very young then. Lu Mao adopted Lu Ji's children and raised them. They left him only after they reached adulthood. The commandery officials wanted to recruit Lu Mao to join the civil service but he refused. Ji Yan, one of Lu Mao's colleagues, was notorious for being very critical of others. When he was serving as a Master of Writing in the Selection Bureau (選曹尚書; i.e., the equivalent of a present-day human resources officer), he often went around spreading news of scandalous incidents involving his colleagues just to show how harsh he could be in criticising others. Lu Mao advised him to forgive others for their past transgressions and focus on praising them for their virtues and contributions instead. He also urged Ji Yan to promote and strengthen a civil culture that might be beneficial to Wu's future developments. Ji Yan ignored Lu Mao's advice and eventually met his downfall. In 232, Lu Mao was summoned to the Wu imperial court and was appointed as a Consultant () and Master of Writing in the Selection Bureau. The Wu emperor Sun Quan hated the warlord Gongsun Yuan for breaking his promise to ally with him against