Yu Liang (庾亮; 289[1] – 14 February 340[2]), courtesy name Yuangui (元規), formally Marquess Wenkang of Duting (都亭文康侯), was a Chinese military general and politician of the Jin dynasty who impressed many with his knowledge but whose inability to tolerate dissent and overly high evaluation of his own abilities led to the disastrous revolt of Su Jun, weakening Jin's military capability for years.
When Yu Liang was young, he was known for his skills in rhetoric and knowledge in the Taoist philosophies of Laozi and Zhuang Zhou.
Further, he became apprehensive of the generals Tao Kan and Zu Yue – neither of whom was mentioned in the list of honors and promotions announced by Emperor Ming's will and believed that Yu had erased their names from the will – and Su Jun, who had allowed many criminals to join his army.
Yu, initially believing that he could defeat Su easily, declined assistance from provincial officials, including Wen's Jiang Province (江州, modern Jiangxi) forces, but instead Su quickly descended on the capital Jiankang (name changed from Jianye due to naming taboo of Emperor Min's name) and captured it in early 328, taking Emperor Cheng and Empress Dowager Yu and forcing Yu Liang to flee to Wen.
This drew a response from Later Zhao's emperor Shi Hu, who attacked several major cities and bases on the Jin-Zhao border, inflicting heavy losses and capturing Zhucheng (邾城, in modern Huanggang, Hubei) before withdrawing.
Yu, humiliated, offered to have himself demoted, and while Emperor Cheng refused, he became distressed and died on the first day of the lunar new year in 340.