Yuan smiled inwardly as he saw Yun Lan walking to her place. Then he noticed someone looking at him with an intense gaze and looked over to see Yun Tian glaring at him.
He probably knew why, Yun Tian must have concluded that he said something to his sister just a moment ago. And he was right.
He spoke to Yun Lan using one of his techniques, which would allow him to control the direction and volume of his voice via the air.
He told her: "Let go of your hesitation and then can you unleash your full potential."
He sensed during her performance, she didn't use all of her power in the two parts. She also hesitated while attacking Tornado Blade. That's why he gave such advice to her.
He was sure she could shatter 5 barriers if she used all of her power. He also thought there may be a reason why she can't do it. But since he isn't her family or master, he could just give her advice.