The Battle of Zhongdu (present-day Beijing) was a battle in 1215 between the Mongols and the Jurchen Jin dynasty, which controlled northern China. The Mongols won and continued their conquest of China. The battle for Beijing was long and tiresome, but the Mongols proved to be more powerful as they finally took the city on 1 June 1215, massacring its inhabitants. This forced Jin Emperor Xuanzong to move his capital south to Kaifeng, and opened the Yellow River valley to further Mongol ravages. Kaifeng also fell to the Mongols after a siege in 1232.