Worldline Investigation Archives! I Can Solve the Puzzle Perfectly

[Unhappy article, no plug-ins, no physical enhancement] [There is no struggle for national destiny, and there are no random murderers] [Here is the purest reasoning and battle of wits] [Strict logic, reasonable plot advancement] Lin Feng is a world line investigator. His mission is to travel to the timelines of various time and space (can be understood as a copy in the infinite flow) to assume an identity and solve those unsolved cases. The novel is fast-paced, with the protagonist solving the case at the beginning and then flashbacks to the entire investigation. Not only did he find out who the murderer was, he also wanted to decipher the truth of the legend fifty years ago and find the legendary treasure. Lin Feng could always solve all cases easily, until he realized something was wrong after completing an investigation. When he called, there was only a cold voice on the other side. "Lin Feng, Millennium Bug greets you..."