Wu Tie was about to leave with Jin Yu. He, as well as the others who have brains, has the same plan as Sun Yan to wait until they have consumed their magic pills before they would buy from Cui Xiang. This is on the premise that they can control their consumption of magic pills and potions.
But, even if you aren't looking for trouble, trouble comes to look for you. Xi He's attention has never been on the competition. It was on him. Thus, Xi He saw him going to leave.
"Wu Tie!" Xi He shouted as he drew his sword.
Jin Yu wanted to roll his eyes but that didn't fit his image. He looked at Wu Tie. "Want me to deal with him?" he asked.
Wu Tie didn't answer and looked at Xi Bing who made a 'please' gesture, indicating he could do anything with Xi He. Xi Bing has given up on this cousin of his with whom he isn't even close.
"Do as you like." He finally answered and turned to leave.