明代中期，蒙古右翼三万户的一些部落陆续西迁，进入西海（今青海湖周围一带），被称为“西海蒙古”。
The parts of the Mongols of the Right Wing who migrated Qinghai in the mid-period of the Ming dynasty was called Xihai Mongols , which changed the inhabiting pattern of the nationalities there .
右翼三万户