Time: 10th day of the first lunar month.
Place: Vo Lao Commune, Thanh Ba District, Phu Tho Province.
Objects of worship: Agriculture Spirit, Mountain Spirit, Water Spirit and Buddha.
Characteristics: day cakes and nang cakes offering in commemorating the place where Hung King lived and chose the son-in-law. Princesses made various kinds of cake to offer their father. Big and round day cakes symbolize for the Sky; uot cakes with pyramid-shaped symbolize for labour force; nang cakes with yellow colour symbolize for pearls and gem.