In what year did the Mongols attack North China?

The Mongols attacked North China in 1211. At the Yehulin ridge, the Mongols defeated a large army of the Jin state. Gradually, the Chinese state began to fall apart. In 1215, Beijing was captured. All this happened despite the fact that the Chinese had a numerical superiority in the army, it was equipped with stone throwers, catapults, gunpowder and the first combat missiles appeared here. However, the main advantage of the Mongols who carried out reconnaissance was their excellent knowledge of the structure of the Chinese army and the country as a whole.