In the early development of human history, black people were mainly distributed in Africa, white people were distributed in Europe, and yellow people.

The yellow race is mainly concentrated in Pan-Asia and America. Except for Africa and Europe, the main race in the Old World is yellow race, but India is an exception. Indians are Indo-European races with the same roots as whites. During the Ice Age, the Bering Strait was once a continental bridge, so some yellow hunters from Siberia crossed the bridge to America and became "red fans" and Incas, Mayans and other races in their long lives. The yellow race in Polynesia migrated between islands in small boats and finally arrived in New Zealand and Australia.