The custom of drinking Lapa congee on the Lapa Festival originated from Buddhism.
The day of the eighth day of the twelfth month of the lunar calendar is the day of Buddha Sakyamuni's enlightenment, ancient Indians in order not to forget the suffering of the Buddha before his enlightenment, but also in order to commemorate the Buddha's enlightenment on the eighth day of the twelfth month to become a Buddha, will be eating mixed porridge as a commemoration on this day.
First you need to soak the red beans and corn for 3-4 hours in advance. Next, the other ingredients are mixed and washed. Finally, all the ingredients are mixed into a pot, add enough water, boil and simmer on low heat to make porridge.