[基本案情] 张某,1999年5月由某市保安服务公司聘用,同年9月,该市保安服务公司委派张某等人到某厂做保安服务工作。2000年7月5日,一辆出租车进入该厂强行将该厂一位干部带走。张某在本人无驾驶执照,机动车车况不良的情况下,接受该厂保卫处的指派,驾驶三轮摩托车(共载6人)至厂区外追赶。行至该市旧关立交桥下时,与对面行驶的车辆相撞,造 [Basic facts] Zhang, in May 1999 by a city security service company hired the same year in September, the city security service company appointed Zhang and others to a factory to do security services. July 5, 2000, a taxi into the plant forcibly removed a cadre of the plant. Zhang without my driver’s license, motor vehicles in poor condition, to accept the plant’s security department’s designation, driving a three-wheeled motorcycle (a total of 6 people) to catch up outside the plant. Line to the city under the old off overpass, and the opposite of the vehicle collided, made