Chun Yufan forcibly dragged Li Cunxu into the Ancient Colosseum, but he didn't control the Ancient Colosseum; instead, he used the duel scroll sent out by the Ancient Colosseum.
As long as one has a duel scroll of the corresponding level, anyone can drag another into the Ancient Colosseum.
Such duel scrolls, Li Cunxu would be willing to buy with Purifying Crystals and could indeed be purchased.
As for why Chun Yufan didn't use the Golden Beast Fighting Arena skill, which could similarly trap Li Cunxu?
There are three reasons.
Firstly, in the Golden Beast Fighting Arena, live broadcasting is not possible.
Chun Yufan wants to defeat Li Cunxu during a live broadcast; the young man is quite fond of fame.
Secondly, once the Golden Beast Fighting Arena is used, it's a duel to the death, where only one can survive.
The Ancient Colosseum is different; it offers flexibility, allowing for either a duel to the death or a normal duel.
