[Guyu] is the 6th of the 24 solar terms, the last solar terms in spring. It is handed over on April 19, the Gregorian calendar. Guyu is the meaning of "rain birth of a hundred valleys", at this time precipitation increased significantly, the field seedlings are first planted, new crops, the most need rain to nourish, is called "spring rain is as expensive as oil". Sacrifice to the sea: the custom of the coastal sacrifice sea. Guyu Festival is also called the "strong festival" of fishermen fishing in the sea. [14] The sea warmed during the valley rain season, and the fish traveled to the shallow Haitian belt. It was a good day to go fishing in the sea. As the saying goes, "Riding the valley rain online field." In order to be able to go out to sea safely and return with a full load, fishermen will hold a sea sacrifice on the day of the valley rain, praying for the sea god to bless. Therefore, the Valley Rain Festival is also called the "strong festival" for fishermen to go to sea to fish. In the old seaside, the village and village have sea temples or Niangniang Temple. When the sacrifice is time, the fishermen carry the offerings to the temple to offer sacrifices, and some carry the offerings to the beach, knock on the gongs and drums, set off firecrackers, and face the sea to sacrifice. The scene is very grand.