However, Li Tu, who was being worried about the emperor at this moment, did not parade around the periphery of the Great Xing'an Mountains, and he was excitedly pressing a large amount of loot to rush to Zhenbei Pass.

This is a long way to say, and the real source has to start from the cavalry team that he repelled Huang Taiji.

Huang Taiji's 30,000 wild Jurchen cavalry was the real elite, even if Li Tu had been strictly trained for a whole year, well-equipped, and had repeatedly gone out of the customs to the Jurchen territory for actual combat. But at the beginning of the battle, he still exchanged the casualties with the 30,000 cavalry for a one-to-one casualty.