这是一篇综述文章的节选:
The synthetic map of Asia shows that South China, inhabited by Southern Mongoloids, is connected with Southeast Asia, and the north part of the Yangtze River inhabited by Northern Mongoloids merges with Siberia and Northeast Asia. This indicates that the Southern and Northern Mongoloids separated at the early time after they were formed as Mongoloids. If the Northern Mongoloids in China came from South China, or in contrast, the Southern Mongoloid came from the north, it would be impossible to form the clear-cut visible boundary between them near the Yangtze River, which was also reached by a variety of other approaches, archeological, craniometric and dental. Therefore, from the point view of African origin, the probability is that the ancestor of Mongoloids came into China from Africa or the Middle East by two routes and then met in the zone of the Yangtze River. One route might be from Africa via the Southern coast of Asia, toward South Asia and Southeast Asia, then turning to the north to reach the Yangtze River. As mentioned above, the early settlers might have crossed the River and occupied some eastern region of North China in prehistoric times before being forced back to the south side of the Yangtze River. The other route to get into China was through the north part of the Pamirs, toward the east and north to reach Northeast Asia. Later they went toward the south to reach the Yangtze River, and arrived in Japan via the Korean Peninsula and America via the Bering Strait.