In the Battle of Changping, why did the elite cavalry of Zhao become invisible?

In the Battle of Changping, why did the elite cavalry of Zhao become invisible?
Changping Battlefield: infantry is the "master"

took place in the Battle of Changping from May to October 260 BC, and has always been regarded as the earliest, largest, and most thorough large-scale war of annihilation in ancient Chinese military history and even in the whole history of cold weapons warfare. As a result, the State of Qin, which won this battle, defeated the last arch-rival, the State of Zhao, and greatly accelerated the process of reunifying China.

Changping Battlefield: infantry are the "masters"

Be outstanding and elegant on any occasion by choosing chiffon evening dresses. Let them shower you with a display of exquisite taste.

Zhao Jun Cavalry: Xiongnu is my dish


Cavalry in the Warring States period: I am not the main force