According to legend, the day of Buddha Shakyamuni's attainment of enlightenment was the eighth day of the eighth month of the lunar calendar, and in order to commemorate and celebrate Buddha's attainment of enlightenment, the ancient Indians named this day Lahai Festival, and as for the Lahai congee, it was because they felt grateful for the Buddha's attainment of enlightenment before the Buddha suffered so much, so they drank porridge of grains and fruits to remember the suffering. Later, these porridges made of grains and fruits became known as Laha congee