At about 7:00 on November 21, 2011, Ao Xiang packed a fruit knife, eye mask, homemade mask, woolen gloves and other tools in a book bag and came to the women's toilet on the 4th floor of Building C, District 6, the school teaching building. Waiting in Class 404, waiting for an opportunity to molest a female student who enters the women's restroom alone.
At about 8:25, the victim Xiaomi entered the women's restroom alone. Ao Xiang followed him in and locked the restroom door. He then put on gloves and a homemade mask, took off his trousers and shoes, and held a fruit knife. , ambush at the door of West No. 2 squatting position where Xiaomi goes to the toilet. When Xiaomi came out of the squatting position after going to the toilet, Ao Xiang strangled Xiaomi's neck with a knife and pushed Xiaomi into the squatting position. Ao Xiang forced Xiaomi to put on the eye mask he had prepared and take off his clothes, then molested her. Due to Xiaomi's strong resistance, Ao Xiang hit his head and face on the ground, covered his mouth and strangled his neck for several minutes, causing Xiaomi to die on the spot. At about 10:20 that day, Xiaomi's body was found.
After killing the victim Xiaomi, Ao Xiang fled to Guangzhou and surrendered at the Square Police Station of the Yuexiu District Branch of the Guangzhou Municipal Public Security Bureau on November 23, 2011. He was detained for the case on November 23, 2011, criminally detained the next day, and arrested on December 8 of the same year.