Outside the window, night falls.
Inside the classroom, the lights are soft and bright, illuminating rows of neatly arranged desks and students buried in their studies.
Jiang Ning is helping Chen Siyu with her math problems.
Chen Siyu's academic performance is only slightly above average in class 8, ranking around twentieth, and even this is inflated.
Because during exams, she and her sister used the Big Swapping Technique.
To win back Bai Yuxia, Chen Siyu has been working very hard in the past few months, often consulting Jiang Ning during evening self-study.
Jiang Ning casually writes her a problem:
"Let vector a=(m,1), b=(1,2), and |a+b|²=|a|²+|b|², what is m?"
Three minutes later.
Jiang Ning asks, "This problem is very simple, don't you have any ideas?"
Chen Siyu: "I know the answer! It's -2."
At first glance, her genius level seems comparable to Xue Yuantong, to actually know the answer.
