Who Is He? an Xin's Soul Penetrates Wei Guoping and Solves the Murder Case Intelligently

[Hard-core detective + not a cool novel + the male protagonist can't break a big stone in his chest and can't physically block bullets + no emotional scenes] An Xin, who has reached the age of 70, returns to 1986 in a blink of an eye and becomes Wei Guoping, a security officer at the electrical machine factory. On the first day of time travel, he appeared at the scene of a murder, a murder without a body, an unknown deceased, an almost perfect crime. As the case progresses, one confusing case after another appears in front of everyone, and the good and evil of human nature are revealed one by one. After resurrecting his life, An Xin is no longer the Bai Yueguang that everyone in Beijing has. At this time, his parents are still alive. While solving the unsolved case, can he change the fate of himself and the Gao family? Eat delicacies without technology or ruthless work, hold the high-tech forensic system of modern forensic medicine, and watch Wei Guoping solve numerous unsolved cases and restore peace to the world!