It was learned that at 11:52 on July 10, the 110 emergency number of Hefei Public Security Bureau received a public report that someone was fighting with knives in a painting room on Huaihe Road Pedestrian Street. After receiving the call, the 110 emergency number immediately instructed the patrolling police car No. 401 nearby to respond to the alarm, and the policemen arrived at the scene in less than 2 minutes. After entering the painting hall on the third floor, the policemen found large areas of blood stains on the ground. The door of an office inside was closed tightly, which seemed suspicious. After kicking the door open, the policemen found a young man covered in blood holding a knife towards the door, ready to rush out. The policemen quickly moved forward and captured him. Inside the office, the policemen discovered four corpses.