陈某与张某系同村村民，平日里两家的关系不错。张家靠自养的农用运输车跑运输谋生，陈某也有自己的致富门道。1997年陈家新批一处宅基地准备建房。在备料期间，出于邻居关系，张某放弃自己跑运输的机会，主动出车给陈家帮工，拉运石料、石砂等建筑材料。一天，张某驾车拉运石 Chen and Zhang with the same village villagers, weekdays in good relations between the two. Zhang rely on self-supporting agricultural transport vehicles to make a living for transport, Chen also has its own door to get rich. 1997 Chen approved a homestead ready for building. During the preparation period, out of neighbors, Zhang gave up his chance to run the transport, take the initiative to work out to help Chen workers, transport stones, stone and other building materials. One day, Zhang driving stone