In the bustling crowd, Gu Xia muttered under her breath, "Oh... a small-caliber 5.56mm bullet, though it leaves a smaller wound on the surface, once it enters the body, it tumbles more than those 7.62 bullets, magnifying the internal damage considerably. It can also penetrate the body faster, and ,a characteristic of this bullet is that it's hard to remove once inside. Hey? Who could be so malicious to do this to Yu Hu?"