Approximately 87% of the national population is of the Viet/Kinh people. According to historians, the Viets are descendents of King Hung, who ruled the Red River Delta during the pre-historic period of 2879-258BC. Two major emigrations from southern China during 5th century BC and 3rd century BC added to this population. Most Viet- Kinh people settled in deltas and coastal regions, and they soon established complex economic and political systems. Seeking fertile land for agriculture, they migrated towards modern-day southern Vietnam Over time, the Kinh have spread the throughout Vietnam.
The Viet-Kinh people selectively adopted Chinese customs, but adapted and modified to fit Vietnamese culture. The Han writing system, which was adopted into Vietnamese own Nom script, although this was later replaced by the present quoc ngu alphabet system. Traditionally, the majority of Kinh Viet people practiced a mixture of Buddhism, Confucianism and Taoism. These introduced into Vietnam during periods of invasion and trade. Buddhism remains the dominant religion, and pagodas and temples play in important role as places of worships. Many customs (notably ancestor worship) have migrated from religious tradition to national cultural practiced, embraced by many Vietnamese who do not consider themselves Buddhist.