C671 The Antidote for Vomiting and Diarrhea

Du Er knew there wouldn't be any backlash from the medicine, but since Ho Yucheng had told him to blackmail him, he naturally wouldn't tell the truth. He rubbed his head and said, "I heard from my grandfather that if the Gu isn't used properly, there will be a backlash."

These words made Lan Jin look at Sun Guohua. She immediately followed up and asked