The subject of this painting is a fierce, stalemate battle between two of the future Five Tiger Generals of the Shu Han, Zhang Fei and Ma Chao in the Battle of Jiameng Pass. The story is taken from the 14th century historical novel Romance of the Three Kingdoms, one of the Four Classical Novels of Chinese Literature.
The Long Corridor (simplified Chinese: 长廊; traditional Chinese: 長廊; pinyin: Cháng Láng) is a covered walkway in the Summer Palace in Beijing, China. First erected in the middle of the 18th century, it is famous for its length (728 m) and its many richly painted murals (more than 14,000 paintings).
Sources:
Muller, Rolf (2005). Zhang Fei’s Fight with Ma Chao from The Long Corridor of the Summer Palace in Beijing, China. Photograph taken on April 17, 2005. Wikipedia, accessed Feb. 2020 – https://en.wikipedia.org/wiki/Long_Corridor#/media/File:Zhangfeifightsmachao.jpg