土地开发、复垦、整理的规模与水平，往往反映出一个国家一定历史时期的社会经济状况与科学技术水平。一般来说，在政治清明、社会安定的时期，总是伴随着大规模的土地开发活动；反之，朝廷腐败、战乱频繁就出现土地荒芜现象，更无暇顾及土地开发。历史的回顾原始社会，实行“? The scale and level of land development, reclamation and reorganization often reflect the socio-economic conditions and science and technology of a country in a certain historical period. In general, during the period of clear-cut politics and social stability, large-scale land development activities are always accompanied by large-scale land development activities. Conversely, corruption and war in the imperial court have led to the phenomenon of barren landlessness and lack of time to consider land development. Historical review of primitive society, the implementation of "?