3月20日19时许，正是乌鲁木齐人铜废钢库职工下班的时间，为了确保库区内的铝、铜等国家财产不受损失，乌市保安公司八钢保安大队班长郭勇和往常一样带领张鹏、张红星等数名队员对进出库区的人员、车辆进行严格检查。他们在检查过程中，发现打工人员高某神情可疑，郭勇随即上前 At 19 o’clock on the March 20, it is the time for the staff of the Urumqi copper scrap steel warehouse to get off work. In order to ensure the loss of property such as aluminum and copper in the reservoir area, Guo Yong, the monitor of the eight steel security brigade of Urumqi security company, Led Zhang Peng, Zhang Hongxing and other members of the crew into the reservoir area, vehicles strictly checked. In the process of inspection, they found that one of the migrant workers looked suspicious, Guo Yong stepped forward