Medical team members deal with a "patient" during a campus emergency drill held in Shenyang Normal University in Shenyang, capital of Northeast China's Liaoning Province, March 12, 2014. Shenyang police and students and teachers carried out an emergency drill on campus on Wednesday in order to enhance people's competence of handling emergencies. (Xinhua/Pan Yulong)

Policemen fight with "gangsters" during a campus emergency drill held in Shenyang Normal University in Shenyang, capital of Northeast China's Liaoning Province, March 12, 2014. Shenyang police and students and teachers carried out an emergency drill on campus on Wednesday in order to enhance people's competence of handling emergencies. (Xinhua/Pan Yulong)

Policemen fight with "gangsters" during a campus emergency drill held in Shenyang Normal University in Shenyang, capital of Northeast China's Liaoning Province, March 12, 2014. Shenyang police and students and teachers carried out an emergency drill on campus on Wednesday in order to enhance people's competence of handling emergencies. (Xinhua/Pan Yulong)

Policemen fight with "gangsters" during a campus emergency drill held in Shenyang Normal University in Shenyang, capital of Northeast China's Liaoning Province, March 12, 2014. Shenyang police and students and teachers carried out an emergency drill on campus on Wednesday in order to enhance people's competence of handling emergencies. (Xinhua/Pan Yulong)

Security guards fight with "gangsters" during a campus emergency drill held in Shenyang Normal University in Shenyang, capital of Northeast China's Liaoning Province, March 12, 2014. Shenyang police and students and teachers carried out an emergency drill on campus on Wednesday in order to enhance people's competence of handling emergencies. (Xinhua/Pan Yulong)