Memory Upload: I Was Tricked into Level C and I Overturned the System

My name is Chen Shiqing, I am 140 years old and dead. I spent my entire life savings to buy the S-class immortality qualification. When I opened my eyes, the system beep told me: Your current level is C level. What is C level? S-class plaything! My personal caregiver stole my S-class qualification and pushed me to the bottom. But he doesn't know—— I have lived for one hundred and forty years, and what I am best at is fighting back from desperate situations. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.