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Song official who won a major victory at Caishi.
Yu Yunwen commanded Song forces at the Battle of Caishi on the Yangtze River, defeating a Jin invasion fleet. Using fire ships and disciplined infantry, he repelled the attack, saving the Southern Song from collapse.
After his victory at Caishi, Yu Yunwen was appointed Grand Councilor under Emperor Xiaozong. He advocated for military reform and northern recovery, but faced opposition from peace advocates.
Yu Yunwen proposed a large-scale northern expedition to recover territories from the Jin, but the plan was rejected by Emperor Xiaozong due to cost and risk. He was subsequently demoted and died in relative obscurity.