2011年12月22日11时40分许,在天津市武清区曹子里乡中心小学门前,一辆19座的金龙中巴车停在校门口等着孩子们放学。不久,来自朱家码头村的30多名学生陆续走出校门,车上的安全员张师傅让学生从低年级到高年级排成两排,依次上车。19个座位坐满后,剩下的孩子在原地等待校车返回。大约20分钟后,这辆校车返回校门口,接剩下的孩子回家。乍一看,校车接送孩子上下学是 At 22:11 on December 22, 2011 Xu, in Caoqing District of Tianjin City, Central Primary School Caozili front, a 19-seat dragon car parked at the school gate waiting for children to get out of school. Soon, more than 30 students from the Zhuji Wharf Village came out of school one after another. The safety instructor Zhang instructed the students to board the students in two rows from the lower grades to the senior grades. After the 19 seats were filled, the rest of the children waited on the school bus to return. About 20 minutes later, the school bus returns to the gate and takes the remaining children home. At first glance, the school bus to send children to school