Lin Mo, a modern college student, discovers that he can travel to the post-apocalyptic wasteland, and the emperor of the wasteland actually looks like Zhu Yuanzhang. In order to save the dying prince, he went to a pharmacy overnight to buy antibiotics, but was rejected because he didn't have a prescription. Lin Mo patted the jade pendant: "Do you know who my grandfather is? It's Zhu Yuanzhang!" The pharmacist rolled his eyes: "I'm still Zhu Di!" - Until Lin Mo performed time travel on the spot and appeared in front of the pharmacy counter with Zhu Yuanzhang.
