Why Not Cross by Boat?

"The blood must be taken again." "But sir, the young master is only three years old. He had a high fever for three days after taking blood last time. If we take blood again, I'm afraid..." "I said, take it again." Gu Changyuan's voice was unmistakable, "Qinghe's child can't wait any longer." Outside the hall, Bai Qingning's hand trembled.