 calendar used in the Qin and Early Han dynasties, covering the period from 221 BCE to 104 BCE. The reconstruction method is claimed to be valid from 246 BCE to 104 BCE, but we only use it for the period from 221 BCE to 104 BCE. The reconstruction method is based on the paper "Researches on Calendars from Qin to early Han (246 B.C. to 104 B.C.) &mdash; centering on excavated calendrical bamboo slips"<sup><a href="QinHanCalendars.html#Li2012">Li12</a></sup> by L&#464; Zh&#333;ngl&#237;n (see also his book <i