Li Yunjia was indeed smart. She had already figured out that her eldest son and daughter-in-law already knew that something was going to happen, which was why they had asked her and her younger son to come to their city.
It was also the reason they had arranged for their uncle and aunt to come to dinner tonight and also made it such a grand affair with elaborate dishes, just to make sure they wouldn't have a chance to go back home.
This way, the whole family would be together in this disaster and not cause worry. She also started to suspect the real purpose of the medicine they had taken that could remove so much filth in the human body and change their appearance so much.
She didn't think it was a beauty product as they claimed. It must have another purpose.
One had to give applause to this woman. She was indeed smart and her thought process was unique. With such intelligence, one would wonder why the author had killed her so early on in the original book.