kely to be the actual rule used in the early Han period.</p>
    
<p>Now let's turn to L&#464; Zh&#333;ngl&#237;n's approach. Since there is evidence to suggest that three different systems were used in the calendar dates on the bamboo slips, the simplest assumption is that the calendrical system was modified at least twice. L&#464; attempts to divide the time interval into three periods and use three different methods based on the <i>s&#236;f&#275;n</i> system to fit the data. He assumes that the 24 solar 