You are sick

Zheng Yuan came back to his senses, pointed at Delfina Dawson and laughed at Old Li, "Listen, is this human language? He just talks nonsense. Even though I'm not a doctor, I can tell that he's talking nonsense. Do you think he's good?"
Old Li opened his mouth at this time, but didn't know what to say.
If cancer can be cured and one can be ten years younger, this problem can really be solved. It will benefit all mankind. But when he hears such mysterious words coming from a young man, Old...