What Does It Mean That I Am a Savior in the Opposite Direction?

*Pseudo group portrait/superpower/combat/suspense On his 20th birthday, librarian Chen Jian received a mysterious gift from his parents twenty years ago, and was inexplicably involved in a brutal serial murder case. With the desperate hope of survival and pursuit of the truth, he will embark on a journey backwards and upward to cut off everything. It is the first time for a new author to submit a book. As the introduction says, the target is third-rate novelists. My wish is to tell this story completely and present the special world I imagined, hoping to gain more progress and recognition.