In 1215, the Mongols also captured the city of Beijing, which was then known as Zhongdu, which burned for a month.
1215 年，蒙古人还占领了北京（当时被称为中都），并焚烧了一个月。
英语百科
Zhongdu 金中都
Zhongdu (中都, lit. "Central Capital") was the capital of the Jurchen-led Jin dynasty in medieval China. It was located in the southwestern part of Beijing's Xicheng District. It had a population of nearly one million by the late 12th century, and was the last and largest pre-modern city built on that location.