an 360 years. There are several reasons why the <i>Sh&#242;ush&#237;</i> almanac was the most accurate ancient almanacs. Apart from the abolishment of the superior epoch, the improvement in observation devices greatly reduced the measurement errors. The almanac also took advantage of the mathematical techniques developed over the past centuries.</p><br><h2 id="references">References</h2><ul style="list-style-type:none"><li id="Qu2005a"><p><span class="ref">[1]</span> Q&#363;, &#256;nj&#299;ng (曲安京), <