f a particular <i>zh&#257;ng</i> cycle. As mentioned above, the leap-year pattern was interrupted in <span class="nowrap">N<sub>-162</sub></span> and the counting was reset to a different <span class="nowrap">y<sub>z</sub></span>. Thus there are two different values of <span class="nowrap">y<sub>z</sub></span>, one for years before <span class="nowrap">N<sub>-162</sub></span> and the other for years after <span class="nowrap">N<sub>-162</sub></span>. The variable c in equation (5) is the number of <i>zh&#25