Tensions between Uyghurs and Han have resulted in waves of protest in recent years . Xinjiang has been the location of several instances of violence and ethnic clashes , such as the Ghulja Incident of 1997 , the 2008 Kashgar attack , widespread unrest preceding the Olympic Games in Beijing , as well as numerous minor attacks
2008 Kashgar attack
2008 Kashgar attack
July 2009 Ürümqi riots