The Battle of Fei or the Battle of Feishui (simplified Chinese: 淝水之战; traditional Chinese: 淝水之戰; pinyin fei2 shui3 zi1 zhan4) occurred in 383 AD at the time of the Eastern Jin Dynasty. Fu Jian of the Former Qin was defeated by the army of Eastern Jin inferior in number.

Jin Shu recorded the story, that during the Battle of Feishui, a well-known go player, bet his villa on a go game against his nephew Xian Zuan, to illustrate that if one is determined one can overcome a stronger opponent.