Chu Yang still remembered that Mo Tianji had said that he was already well-versed in the technique 'Grasping the World's Destiny' when Chu Yang had left the Mo Clan. Mo Tianji could also have a glimpse into the heavenly secrets of fate.
He remembered that Mo Tianji had said those words very confidently. Chu Yang knew that it was not so simple that Mo Tianji "could have a glimpse". Mo Tianji had certainly gotten deep accomplishments. And, that's why he had said that.
Chu Yang could tell that it was because of Mo Tianji's nature… He wouldn't blow his own trumpet. He would never say so even if he were 60% sure. He had to have at least 80% confidence now that he had said it.
In other words, he was very confident in foretelling the heavenly secrets of fate and could avoid any terrible disaster.
But, he had this appearance now that made it clear that he had been counter-attacked by the heavenly fate.