[2] The town spans an area of 210.92 square kilometres (81.44 sq mi).

[3] In the early 7th century, during the Tang dynasty, the urban center of Jinming County (simplified Chinese: 金明县; traditional Chinese: 金明縣; pinyin: Jīnmíng Xiàn) was located in present-day Diezigou Village in Yanhewan.

[4] During the Song dynasty, Ansai Fort (Chinese: 安塞堡; pinyin: Ānsāi Bǎo) was built in the ancient city of Ansai, located in present-day Yanhewan.

[3] In September 1958, Yanhewan became a people's commune, and was renamed to Hongqi (Chinese: 红旗; lit.

[3] In December 1983, the people's communes were abolished, and Yanhewan was established as a town.