LiRuyan,13yearsold,didsomethingspeciallastsummerwithhis...
问题详情:LiRuyan,13yearsold,didsomethingspeciallastsummerwithhisclassmatesinShanghai.Theyworkedingroupswithtrafficpoliceatdifferentcrossroadsinthecity.Holdingsmallredflags,thestudentshelpedkeeporderand...