liu mentions five books he authored listed in the order they appear in the second paper pocket year chinese calendar year chinese calendar year chinese calendar pocket year chinese calendar many editions since newly compiled perpetual chinese calendar you have given the second book above literally means year chinese calendar not the edition of the last on the other hand a new edition is published either because the previous edition is out of print new information is added or errors have been discovered the last reason opens the possiblility that liu might have changed his mind concerning how to handle the irregularity i doubt this because liu meticulously lists all errors long vs short months in the wannian shu between and indicating he would mention his own 'error' only copies of the and editions would settle this issue