September 20 18 18 at about 6 am, I drove a Mercedes GL450 and took my girlfriend Lin to a massage health club in West Road. Ma Wencong's father, Ma Ziguang, said that the two of them wanted to have a foot massage. The car arrived at the massage health club downstairs, facing the street is a row of storefronts, and there are several parking spaces in front. When Ma Wencong stopped the car, he had an argument with the owner of one of the shops. There are two theories about the cause of the dispute. At that time, Liu Xiuying, the owner of this store, was recharging a customer's phone bill in his10 million gram food parity store when he suddenly heard the billboard creaking in the parking space in front of the store.

According to the police, when Ma Wencong saw the billboard in the parking space, he shouted, Whose billboard? Move it. A security guard around came and moved the billboard; Liu Xiuying immediately moved the billboard back to its original position. Ma Wencong continued to drive the Mercedes, and then they stopped and had an argument. Things escalated rapidly. Ma Wencong opened the car door and rushed into the shop. He first kicked the cashier, then smashed the glass counter with his fist, and then picked up the phone next to him and smashed it at the counter. Finally, he grabbed a calculator and smashed it at Liu Xiuying 18-month-old daughter Po. Near Po's left temple, a one-centimeter-long incision was made and blood flowed out. Liu Xiuying said, "You can see the white thing in the wound." Liu Xiuying said that Ma Wencong deliberately took the calculator and smashed her daughter.

Ma Ziguang said that he learned from the staff of Tuina Health Club that Po's injury was an accident. Ma Wencong picked up the calculator and fell to the ground. It bounced up and hit Po.