or four generations living under one roof. Communication culture in traditional Vietnamese families tends to follow the top-down stereotype and is highly hierarchical. Vietnamese people transmit the family culture through teach communication. The three core relationships in the Vietnamese society are king - people, father - child, wife - husband. The father - child, wife - husband relationship shows that the father has the biggest role and position in the family and has a strong influence on the rest of the family. Today, the father - child relationship has started to transition into a parent child relationship as both parents have profound influence on their children. Feudal eras Pre-Sinicization Nanyue Prior to Han Chinese migration from the north, the Yue tribes cultivated wet rice, practiced fishing and slash-and-burn agriculture, domesticated water buffalo, built stilt houses, tattooed their faces, and dominated the coastal regions from shores all the way to the fertile valleys in the interior mountains. They also practiced teeth blackening. Water transport was paramount in the south, so the Yue became advanced in shipbuilding and developed maritime warfare technology mapping trade routes to Eastern coasts of China and Southeast Asia. The ancient Han Chinese referred to the various tribal groups of people living in southern China and northern Vietnam as the Baiyue people (a group that existed from 1000 BC to 1000 AD), saying that they possessed habits like adapting to water, having their hair cropped short, and possessing body tattoos. The ancient Northern Yue are considered one of the progenitor groups of modern Lingnan culture (Cantonese culture), while the Southern Yue people are considered one of the progenitor groups of modern Vietnamese culture. Ancient Han Chinese had described ancient Yue people occupying Nanyue as barbaric, comparing their language to animal shrieking and had regarded them as lacking morals and modesty. Ming rule During the Ming rule of Vietnam after the Ming–Hồ War, the Vietnamese were ordered to stop grow their hair long, switch to Han Chinese style clothing, and stop the practice of teeth blackening so that they could have white teeth and long hair like the Chinese. Later cultural relations with neighbors A royal edict was issued by the Lê dynasty in 1474 forbidding Vietnamese from adopting foreign languages, hairstyles and clothing of the Lao, Champa or the "Northerners" which referred to the Ming. The edict was recorded in the 1479 Complete Chronicle of Dai Viet (Ngô