我国古代的封建帝王一般都采用年号纪年,但有几种情况例外。第一种是年号纪年始于汉武帝,在汉武帝以前,国君即位只采用王号纪年,不建年号,如秦始皇二十六年、汉王元年。第二种是出于“奉正朔”或重前代帝王的原因,不另建年。如五代时期的吴越,先后梁、、晋、汉、周、宋的年号;? Ancient Chinese feudal emperors generally use Chronology, but there are several exceptions. The first is the chronology of the Han Dynasty began in the Han Dynasty, before the Han Dynasty, the monarch ascended the throne only used the king age, not built, such as Qin Shi Huang twenty-six years, Hanwang first year. The second is out of “Feng Zheng Shuo” or re-generation emperors reasons, not another year. Such as Wu and Yue Dynasties period, Liang, Jin, Han, Zhou, Song's reign;