Legend has it that once on the 7th day of the 1st lunar month, while Princess Shouyang was resting under the eaves of Hanzhang Palace near the plum trees after wandering in the gardens, a plum blossom drifted down onto her fair face, leaving a floral imprint on her forehead that enhanced her beauty further. So they started decorating their own foreheads with a small delicate plum blossom design.