The ancients had a tradition of sacrificing to ancestors and gods, praying for a good harvest, and some areas have the custom of drinking Lahai congee. Legend has it that this day is also the day of Buddha Shakyamuni, known as the "Dharma Treasure Festival", is one of the great Buddhist festivals. Laha custom: eat Laha congee. Laha this day has the custom of eating Laha congee, Laha congee is also called "seven treasures and five flavors of congee". The history of drinking Laha congee in China has been more than a thousand years. The earliest began in the Song Dynasty. China is a vast country with a long history, so the custom of Lahai Festival is not the same in all parts of the country