First the black beans are cleaned, cooked, and cooled, then they have yeast added to assist the fermentation. Next they're stirred constantly to mix the yeast in evenly with the beans, and then sifted through a large colander to help evaporate out the water. Finally the mixture has salt added to it and the urn is sealed and left in the sun to heat through.
首先將黑豆洗淨煮熟、舖平冷卻、灑上酵母菌種幫助發酵；接著不停翻攪，讓菌種均勻地包覆在黑豆外，再裝入大型竹簳中，讓水份揮發，最後加粗鹽封缸，在曝曬場上等待熟成。