1. Skin color: Most people in Hainan have dark skin, while people in Northeast China have relatively white skin.

2. Five senses: The five senses of Hainan people are large eye sockets, pointed nose, thick lips and square face. Northeast people's facial features are more obvious. Their eyes are big and round, their noses are tall and prominent, and their faces are round.

It should be noted that not everyone will show the above characteristics, and the differences of these characteristics will be different due to personal heredity, living environment and other factors.