The Xianbei is an ethnic minority group in Northern China.

鲜卑族是我国北方的一个少数民族.

The head scarfs, here, suggest people of the Muslim faith, possibly Hui people, the largest ethnic minority group in Gansu.

戴头巾表示他们是信仰回教的人，可能是回族人，这是甘肃最大的少数民族。