According to the legend, April 8th of the lunar calendar is the birthday of Sakyamuni. On this day, monks and nuns of Buddhist temples hold rituals and follow the legend of "the Dragon King bathes Prince Sakyamuni by perfume", to commemorate the birth of Buddha, so this day is called "Bathing the Buddha Festival".
In old days, temples in Huai’an also had the custom of bathing the Buddha, and the masses bought fish, tortoise, snail and mussel to free them, and ate black rice. And in some countryside places, people divined prices of grain according to wind direction on the day of the festival.