C453 Old Lady Mu's will

Qiao Xin'an grabbed a box of tissues in a flurry and used one hand to pin his head down a little bit. While wiping, she said, "When bleeding nose, if your head is raised too high, the blood flow is reversed. If the trachea is blocked, it will be terrible..."

Mu Zhengyan lowered his head and saw the surging trachea, his eyes shooting out a fierce light