C90 Pretend not to understand

Before I could say anything, Ziyi quickly walked up and picked up the switchblade from the ground. He suddenly grabbed He Xiaogang's wrist, and with a strong momentum, he kicked He Xiaogang's leg again. He Xiaogang fell heavily onto the ground, and one of his arms was pressed down by Zuo Ziyi.

My heart clenched. I don't know why, but at that moment