C813 They Are Not Sick

"Don't be rude to Mr. Zhang!" The old man frowned and scolded. He turned around and said to Zhang Xiaoloong, "I'm sorry, Mr. Zhang. I've made you laugh."

"He is right. I am not a doctor. Even if I know a little medical knowledge, I rarely treat people. I can't prove anything just because of one sentence from me." Zhang Xiaoloong was not angry.

In his opinion, this old man was not a good person