Who is to be afraid of who in a desperate struggle?

Seventh Master Xiao could only smile bitterly; he knew that Ye Wubo wouldn't believe him. But he insisted on saying, "Ye Wubo, speak with your true heart, am I the kind of person who's afraid of trouble? Even if we were really enemies, how would I be afraid of you?"

Seventh Master Xiao continued sincerely, "If all these things were really done by me, why should I explain them to you? Wouldn't it be more direct to fight with you? Brother Ye, you must believe my painstaking efforts."

Ye Wubo laughed, and said admiringly, "Seventh Master Xiao, I really admire you! How does your mouth grow? I feel really strange. When your upper lip touches your lower lip, white becomes black; when your lower lip touches your upper lip, black becomes white again…"