Generally speaking, in internal conflicts, the party who starts the trouble will often be punished.
However, this rule does not apply to everyone. If it were an ordinary disciple, it would be quite normal to be punished. But it's different for core disciples.
Moreover, there is no substantial evidence, and he has just arrived and is alone. If others were to handle it, these three people wouldn't suffer any damage. Instead, it would only make them more aggressive.
This is perfect, Yang Chen isn't the type to let others deal with his own problems either.
Now looking at the strength of the three, He Shouyi and Chi Yunjian have reached the Jinzun Stage. He's not too concerned about this level of strength; the key is the woman in the rear who gives him an unfathomable feeling.
These three are all extremely difficult to deal with, but their ages seem to be larger than Bai Wuheng and the Xuandao Sect disciples he has seen.