Bearded pods (Note: During the reign of Emperor Yao, a strange grass was born in the imperial court. From the first day of every month, the grass grows a leaf every day, and after fifteen days, it drops a leaf every day until the last day of this month. If this month is a small moon (one day less), the last leaf will only wither and not fall. Emperor Yao is very strange, called "pod", also called "calendar grass". People think it is a symbol of auspicious grass. )