C541

"These are two plans for streets within the city. One is the 1990 Qingdao Road, and the other is the 2010 Qingdao Road. The location depicted on the map was the same road as the crime scene. If you look carefully, there's still the alley where Lv Aiqing was killed. The two pictures are exactly 20 years apart. "

"…"

"After carefully comparing the two diagrams, I accidentally found a key problem