Ningxia, broke off from Gansu in 1958 and was reconstituted as an autonomous region for the Hui people, one of the 56 officially recognised nationalities of China.
The Hui people are a predominantly Muslim ethnic group in China.
I was invited to a seminar in this remote area and although had to spend four days at the seminar , I did mange to get out twice, once to the old town and once to Inner Mongolia.
Here you see the Grand Mosque in the old town of Yinchuan.