In May 13, 2011, an arson explosion occurred in the conference room of the five floor of the credit union office building in Tianzhu County, Gansu province. More than 40 people were injured in varying degrees.

After receiving the alarm, the main leaders of Tianzhu county Party committee and county government immediately made instructions and immediately launched the emergency plan.

The leaders of the county Party committee and the county government quickly organized the departments of public security, fire prevention and health, and rushed to the scene to arrange for deployment.

On May 13, 2011, at 8 o'clock in the morning, Yang Xianwen, a worker of Tianzhu County's former Credit Union (male, Han nationality, who was born in August 1971 on 1 August 1971, lived in Tianzhu 11-7, Tianzhu Road, Tianzhu County), threw a gasoline bottle and threw it into the conference room of the five floor of the credit union, causing fire in the conference room.

At that time, the staff of the credit union organization concentrated on the study in the conference room. After the fire broke out in the conference room, some workers were burned. Some workers were injured by jumping to the three storey building on the five floor of the conference room window.

Up to now, all the wounded have been rushed to Tianzhu County People's Hospital for emergency treatment. At present, 19 people are seriously injured. The rest of the wounded are being examined.

Investigation: Yang Xianwen was originally a cashier in the Finance Office of the credit union. He was expelled from the credit union by misappropriation of funds in April 2011, so he had a grudge and set fire to revenge and fled the scene after the crime.

At present, the fire inside the building has been extinguished.