Wu Gang seemed to notice Du Yali's thoughts, so he started talking to her constantly, trying to divert her attention.
"Sister-in-law, about this method of treatment, it'd be better if you don't tell Captain Zheng about it. If someone asks how you recovered, just say it was through acupuncture, okay?"
The reason why Wu Gang said this was that he was afraid Du Yali might say something wrong. If Zheng Weimin found out about this, it could easily lead to some unnecessary misunderstandings. Moreover, Wu Gang didn't want too many people to know about his method of treatment.
In the incident involving Lew Zhe before, Wu Gang hadn't thought it through and had simply cured him, forgetting to tell him not to talk about it with others.
"Mhm, I understand," Du Yali nodded. She clearly grasped Wu Gang's meaning, yet suddenly she felt a bit guilty towards Zheng Weimin, even though she hadn't done anything improper.