They don't have any mounts. They are running towards the rebels at full speed, but their speed is so fast

this is the soldier of the Chiyi nationality. Their mount, rhinoceros, has lost most of the money in the battle of defending Yunjing. The rest dozens of them have also been put on the Qiushan mountain outside of Yunjing. Although Zhuge Yishi guessed that the prince might rebel this time, dozens of rhinoceros won't help much

Chiyi soldiers without mounts are the strongest heavy infantry in the world. Under the leadership of Chiyi Chen, they rush to this side at full speed

the archers of the rebel army naturally opened...