Yang Jingyu (traditional Chinese: 楊靖宇; simplified Chinese: 杨靖宇; pinyin: Yáng Jìngyǔ; February 13, 1905–February 23, 1940), born Ma Shangde (traditional Chinese: 馬尚德; simplified Chinese: 马尚德; pinyin: Mǎ Shàngdé) in Queshan, Henan, was a Chinese Communist, commander-in-chief and political commissar of the First Route Army of the Northeast Anti-Japanese United Army, in the guerrilla war in Manchuria against the Japanese campaign to pacify Manchukuo during the Second Sino-Japanese War.