What kind of wood is used to make dragon boats?

General dragon boat is divided into several types, a traditional dragon boat, a standard competition dragon boat, there is a competition dragon boat, but not according to the standard to build. Traditional dragon boat with kundean wood to do, this wood can be immersed in water for years without rotting, and because the dragon and water are inseparable, so the traditional dragon will use this wood to build. Standard racing dragon boat with fiberglass compounds, the general ancestral temple with cedar wood, lightweight, but can not be immersed for a long time