中国古代的纪元方法过於幼稚简单,只有“维王某年”甚至“维某年”一类的字样;使後人读了不知到底是何王何代,以至有铭刻的铜器虽发现了不少,但年代多不可考,使研究古史的人不敢放心的引用。直到战国时代仍沿用这种纪年法。但那时已有了改元的制度。例如秦惠文王本称秦伯,十三 The ancient Chinese era method is too naive and simple, and only “Von Wang Year” or even “certain year” a class of words; so future generations do not know what Wang Ho generation in the end, as well as the engraved bronze Although found Quite a few, but many years can not test, so that people can not rest assured that the study of ancient history. Until the Warring States Period is still used in this method of dating. But then there was a system of change. For example, Qin Hui Wen Wang, said the king, thirteen