Talking about the traditions and customs of Halong, Hát Giao Duyên (a variable of the local folk singing) could be said the most unique feature, which is belong to fishermen in Cửa Vạn fishing village. This type of traditional folk singing includes Hát Đúm, Hò Biển, and Hát Đám Cưới, in which Hát Đám Cưới (wedding singing) is still remaining and preferred by the local as their pride.
Elders in Cửa Vạn Village say their wedding singing is not less pleasant and attractive compare to the famous Quan Họ Singing in Bac Ninh Provine. Additionally, all the wedding in Cửa Vạn Village are organized in the 15th day of a lunar month when the Moon bright the whole bay with its gentle light that make all the fishes stay deep under the sea.