七孔玉刀从夏代起,中华民族就进入了奴隶社会,奴隶社会在中华文明史中存在了两千年。两千年当中,玉器开始发生改变。首先是兵器增加,比如斧、戚、钺、刀、戈等等。为什么兵器增加呢?说明社会矛盾的加剧,有阶级就有冲突,有国家就有冲突。怎么解决冲突呢?当时都是靠武力,打仗,所以兵器就变得非常重要。但是用玉做兵器,并不是用它来打仗。玉非常脆,再锋利也不可以直接用于战场,一砍就折了。玉 Seven holes jade knife From the Xia Dynasty, the Chinese nation entered the slave society, the slave society in the history of Chinese civilization existed for two thousand years. Two thousand years, jade began to change. The first is the increase of weapons, such as axes, Qi, 钺, knives, Ge and so on. Why arms increase? Explain the aggravation of social conflicts, there are classes have conflicts, there are conflicts in the country. How to solve the conflict? At that time, all by force and war, weapons became very important. But using jade as a weapon does not mean using it to fight a war. Jade is very brittle, then sharp can not be used directly in the battlefield, a cut off on the fold. jade