After Getting One Point in the College Entrance Examination, My Sister Panicked

I only scored 1 point when I turned in a blank paper in the college entrance examination, but I asked my sister who exchanged points to sacrifice 20 years of life and transform from a young girl to an old woman! In my previous life, I traded 723 points for Tsinghua University's strength for my sister's 213 points for vocational school jokes, and finally jumped from the 18th floor. After being reborn and returning to the college entrance examination room, I slept on my stomach throughout the whole process and only wrote a solution to math - because I knew that my sister was bound to the life exchange system and exchanged 10 years of life for my scores! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.