Time: 7th day of the first lunar month.
Place: Cam La Commune, Ha Nam Island, Yen Hung District, Quang Ninh Province.
Objects of worship: Founding fathers who built dykes, created the populated Ha Nam Island.
Characteristics: The senior men of the village (all older than 70 years old) go to the temple for congratulation ceremony; wrestling show.
Their children or grandchildren carry offering on their head to the decorative cult tables, especially there is a long ma (horse-dragon) made from fruits on the tray. The elder men follow them, if some of them be weak, aided by their offspring. After the liturgy comes the ground-breaking ritual: the four chosen longevity men pick four balls of earth and build a mock dyke in front of the incense table of the founding fathers (Tien Cong). They then perform acts of wrestling to represent the “struggle against nature". This is to continue the cause of those who built dykes on the sea to protect the villages and hamlets of the island.
After the ground-breaking ritual are games buffalo fighting, cock fighting, human chess, swinging, popular opera performance.