While the low comparative benefit of agriculture,the obstacle of the free flow of workforce and imperfectness of social security system are the main reasons at the moment,and even will last ...

• 为防止城乡收入差距的进一步扩大,必须从这些非竞争性因素入手,积极地致力于对农业的支持和保护、促进劳动力流动和农民的非农就业以及农村社会保障制度的建立和完善。