The Schoolgirl Secret Agent SSA

She was the top level hacker, the number one secret agent, unexpectedly rebirthed as an ordinary ninth grader.
Debt dunned by her gambling-addicted father, who dared borrow from loan sharks. Having unbearable family relatives...
Yun Jian who was rebirthed chuckled humorlessly, palming her forehead. Do they wish to know how death was spelled?
A striking return, an unforgettable retaliation - I shall kill anyone who bullies me!
Heroine Yun Jian, Leading male Si Yi
P.S. A feel-good novel, revenge, face-slapping, powerful female and male protagonists, and requited love!