gh the <i>zh&#257;ng</i> cycle is not specified, it can still be calculated by finding the least common multiple of <span class="nowrap">T/A</span> and <span class="nowrap">U/A</span>. However, the computation of lunar conjunctions used for calendars took into account the non-uniform motion of the Moon since the 7th century, whereas only the mean motion of the Moon was taken into account for calendars before. So the <i>zh&#257;ng</i> cycle no longer corresponded to the cycle of leap months. As will be expla