Xiao Qian's diagnosis might be able to fool Uncle Liu and his son, but it wouldn't fool Professor Liu.
Professor Liu knew in his heart that this was definitely the scheming of Steel Cannon and Yu Gangdan. These two kids were smart, and whenever they were together, they loved getting up to mischief.
It seemed that this time the kids had assisted Uncle Liu with an assist. However, Professor Liu took advantage of this situation and pretended to know nothing.
Okay, let's pretend that his son has a "manic disorder" then...
Yu Minglang escorted Xiao Qian outside, where a car was already waiting for her.
"I can't send you back." Yu Minglang regretfully helped Xiao Qian straighten her collar.
"Don't worry, I can go back by myself." Xiao Qian didn't wait for Professor Liu, guessing that he should be with the family of three at the moment. With Uncle Liu there, she wouldn't need to intervene.