The cold light of the laptop reflected Li Yang's pale face. His fingers were tapping rapidly on the keyboard, and garbled codes kept popping up on the screen. The black diary I bought from a second-hand bookstore three days ago was lying quietly on the table at the moment, with strange lines faintly appearing on the gold cover. "Zhao Yu, look at these dates -" Li Yang suddenly paused and the mouse wheel scrolled down crazily, "From 1947 to now, there will be a disappearance case every twenty years, and all the victims have come into contact with this diary before disappearing!"
Detective Zhao Yu pushed up his gold-rimmed glasses and his pen rustled on his notebook. The cuffs of his suit were stained with coffee from tracking down leads this morning. "The key lies in the encrypted text in the diary." He picked up a yellowed page with tweezers, "I have compared Morse code, Caesar code, and even medieval alchemical symbols..." Before he finished speaking, the glass in the office suddenly exploded with a "bang", and a bullet flew past Li Yang's ear, leaving a blackened bullet hole in the wall.
