Yuetan Park is located on the west of Nanlishi Road and on the south of Yuetanbei Street, Xicheng District. Formerly known as "Xiyue Altar", it is one of the five altars in Beijing. It was built in the 9th year of the Jiajing Period in the Ming Dynasty (1530 AD), and was the place where the emperors of the Ming and Qing dynasties offered sacrifices to the Night God (the moon) and the gods of the constellations on the day of the autumn equinox. It is now a key historical and cultural site under national-level protection. Yuetan Park covers an area of 8.12 hectares and is divided into two parts, namely the South Park and the North Park. The North Park is characterized by ancient buildings with red bricks and green tiles and regular roads, while the South Park is a natural landscape garden composed of mountains, rocks, pools, and winding roads.