King Dương Vương married Long Nữ and had Lạc Long Quân. Lạc Long Quân has superhuman strength and likes to stay near water, because he was believed to be descended from the line of Dragons.
Đế Lai and his daughter Âu Cơ made a trip to the South. Đế Lai admired Lạc Long Quân a lot and married Âu Cơ to Lạc Long Quân.
Âu Cơ became pregant and gave birth to a membranous sac. It got bigger each day and burst on the seventh day. It hatched into one hundred babies.
Lạc Long Quân missed the coast so he told Âu Cơ that he was gonna take 50 children to the coast and she would take 50 to the highlands.
He educated the children about agriculture. He also showed them how to cook rice in a bamboo tube with some water and broiled over an open fire.
Even though, they were separated, they would still help each other if needed. The children of Âu Cơ and Lạc Long Quân are the ancestors of Việt Nam and so the Vietnamese is known as "Dragon and Fairy Descendants."