When Beigong Chun was at the camp, he confirmed through the Thousand-mile Eye that the person coming was Tuoba Yilu. He also brought many familiar generals.
For no reason, bringing so many capable fighters to the border, to say he had no ulterior motives, even if you killed Beigong Chun, he wouldn't believe it.
However, he also knew that the domestic situation was currently complex. Although he was loyal to the Jin Dynasty, the Great General treated him well too, so he couldn't decide which side to stand on.
But the Emperor didn't make him choose, nor did Zhao Hanzhang force him to.
So he simply covered his ears, blinded his eyes, and pretended to know nothing, only focusing on guarding the border.
