Chinese/Tibetan Concentration (IMAGE) Princeton University Caption The researchers used 2000 Chinese census data to determine the fraction of Han Chinese living in each settlement. Settlements where at least one-third of the population are Han Chinese (orange and red dots) are clustered on the lower edges of the Tibetan Plateau at around 8,900 feet above sea level. Credit Image by Tsering Shawa Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.