The people of this world already know not to marry close relatives, so unless there is no blood relationship within the same tribe, marriages will not occur. However, the uniqueness of primitive society results in almost everyone within the tribe being related by blood.
Just like Da Shi and Feicao, they belong to the same tribe yet have no blood relation; such cases are extremely rare. If it weren't for the Lanshan Tribe frequently participating in the Red Flower Festival and incorporating external bloodlines, the Power Tribe and the Lanshan Tribe wouldn't dare engage in long-term alliances.
Previously, apart from matchmaking with the Helie Tribe, young men and women of the Lanshan Tribe found their partners at the Red Flower Festival. This ensured not everyone within the tribe had blood relations.
Of course, there are also cases at the Red Flower Festival where one doesn't find a partner and instead has a one-night affair, which would be great if a child resulted from it.
