Within the cultural complex of Hue, if the system of palaces and royal tombs defines the face of an Imperial capital, the villages along the lagoon and coastline preserve the depth of community life. There, heritage does not lie dormant in the past but lives on in every festival season, every daily custom, and every belief tied to the natural environment. The Cau Ngu Festival of Thai Duong village, held once every three years in January at the Thuan An seaport, is precisely such a heritage - a vibrant cultural practice where community memory, maritime knowledge, and the will to survive have woven together into an enduring whole across hundreds of years.