Xu Jiang was guarding the ancestral medical clinic, which was empty of people, and was planning to run away before the First Emperor died suddenly. Ying Zheng pretended to be a passing merchant and brought Zhao Gaozhanghan to ask for water. After drinking a bowl of herbal tea, he asked casually: "Where is the doctor?" Xu Jiang raised his eyes and glanced at the "merchant" whose robes were embroidered with dragon patterns. He lazily leaned back in his chair and said, "The doctor has run away. I will take over." Ying Zheng raised the corners of his mouth slightly and sat down on the bench: "Then let me take a look at his pulse."