Although the giant panda is cute, you should remember that it is a bear, not a cat. And now there are two kinds of giant pandas, one is from Sichuan and the other is from Shaanxi. I don't know what giant panda Chiyou rode in those days. However, according to historical records, Chiyou is a barbarian, and it is estimated that he rode a giant panda in Sichuan.
It may be said that many people still think pandas are cute, but have you noticed a detail? Pandas can tear dried bamboo into strips with their teeth. If we can't feel the power of the panda, then we can take a dry bamboo and try to tear it with our fingers and teeth, and we will know how difficult it is.
Adult pandas weigh more than 300 Jin, with canine bite force 1298.7N and split bite force1851.9n. This unit may be used to describe bite force, but you don't feel horrible. Just compare with the tiger. The bite force of tiger's canine teeth is 1472. 1N, and the bite force of tiger's cracked teeth is 2 146.7N, which is only a few hundred n away from that of panda. In other words, if the environment, size and skills are ignored, the fighting capacity of tigers and pandas is equal.
And you have to remember that Chiyou is not an ordinary person, nor is he riding an ordinary panda. He must be the panda king at the last moment, right? Then its fighting capacity is at least a little higher than that of ordinary pandas, and tearing a tiger or lion or something is definitely no problem. Speaking of which, do you still think pandas are "stupid"?
In addition, it should be noted that Chiyou rode a wild giant panda. Although it may be the same species as the current giant panda, physical skills and combat skills are definitely not on a baseline, and there is no way to compare them. If the panda in those days was like the panda now, it would be interesting for Chiyou to ride it to fight, so the emperor and Yan Di wouldn't have to jointly beat him, and his mount wouldn't be called "iron eater".