Squad leader Li Yang (right) of a patrol team from the Armed Police Corps in Chongqing demonstrates an emergency rescue technique if a person is caught in an escalator during an accident. Last Saturday, the team held an escalator rescue drill at the crowded Chongqing North Railway Station to raise their rescue capability, following the death of a four-year-old boy last Thursday who was caught in an escalator at a Chongqing train station.