我们多民族统一国家的疆土基本上是清朝前期奠定的。康熙、乾隆年间,清王朝为统一全国、稳定版图做出了不懈努力,终于使中国疆域东至库页岛,东南至台湾;西跨葱岭,西北至巴尔喀什湖;南包南海的南沙群岛;北连西伯利亚。这样一个空前统一的封建帝国,不仅陆疆广大,而且海域辽阔。因此,从国防战略角度考察,海防与塞防都是不容忽视的问 The territory of our multi-ethnic reunification is basically laid in the early Qing Dynasty. During Kangxi and Qianlong years, the Qing Dynasty made unremitting efforts to unify the nation and stabilize the territory. Finally, the territory of China finally went to Sakhalin Island and southeast to Taiwan. At the west of Lingchuan and northwestern to Balkhash Lake, the Nansha Islands in the South China Sea ; North of Siberia. Such an unprecedented unified feudal empire, not only the vast land, but also the vast sea. Therefore, from the point of view of national defense strategy, both defense and prevention should be ignored