长城,国防的代名。古老的长城,反映了古老中国人原始而朴素的国防观,对此,“国”字的演变可以作证。甲骨文的国字被写成“(口戈)”,字意是用武器保卫人口;铜鼎铭文中的国字又被写成“或”,字意是除用武器保卫人口外,还要保卫土地,所以“戈”“口”之下又多了一横;后来又在“或”字周围加了一个框,国家被写“國”,意思是国家周边该有防。“國”反映出的国防思想应用于 Great Wall, the name of national defense. The ancient Great Wall reflects the primitive and simple concept of national defense of the ancient Chinese. To this end, the evolution of the “Guo” character can testify. The inscriptions on the inscriptions on the oracle bone are written as “(port Ge)”. The word meaning is to defend the population by means of weapons. The national characters in the inscriptions of the Tripod Inscriptions are also written as “or,” meaning that in addition to using weapons to defend the population, One more square was added under the mouth of “Ge”; later, a box was added around the “or”, and the State was written as “State”, meaning that there should be protection around the country. The ideology of national defense as reflected in the “state” should be used