The origin of Laba Festival is mainly related to a legend of Sakyamuni Buddha: It is said that Sakyamuni Buddha practiced in the deep mountains and one day jumped into the river to bathe, but he was unable to climb back to the shore.

A woman named Su Yeda saved him, and Su Yeda also gave him a bowl of porridge made of rice and chestnuts. After the Buddha ate it, he finally became a Buddha under the bodhi tree.

From then on, Buddhist disciples will send porridge to the world on this day. Affected by this, the folk also gradually formed the custom of eating Laba porridge on Laba Festival.