Su Jian and Du Yu fought, and Du Yu hit Su Jian with a polo mallet in front of everyone, which is undeniable.
After Minister Feng from the Ministry of Justice took over, he immediately summoned Du Yu for interrogation, although without detaining him, but the message was clear, Du Yu couldn't leave the capital any time soon.
But precisely because it happened in front of everyone, it's well known that although Du Yu used the polo mallet to hit someone, Su Jian was capable of getting back on the horse at that moment.
When Su Jian was hit with the mallet, Du Yu even assumed a defensive posture, preparing for Su Jian to mount again and strike back with the mallet.
It could be said that at that time, Du Yu was fully prepared to have a serious fight with Su Jian.