Firstly,in most of the families in China both of the parents have to go out for work in order to earn more money to provide better environment for their lovely children.Unfortunately,this causes the rare communication between them and theft children,since these parents always take rest during leisure time.These parents and children cannot know deeply about each other and friction will appear.Secondly,parents who ask their children to be absolutely obedient is also one of the grave causes of the generation gap between them