Ma Qi
After ethnic rioting between Muslims and Tibetans broke out in 1918, Ma Qi defeated the Tibetans. He heavily taxed the town for eight years. In 1921 he and his Muslim army decisively crushed the Tibetan monks of Labrang monastery when they tried to oppose him. In 1925 a Tibetan rebellion broke out, with thousands of rebels driving out the Muslims. Ma Qi responded with 3,000 Chinese Muslim troops, who retook Labrang and machine-gunned thousands of Tibetan monks as they tried to flee. Ma Qi besieged Labrang numerous times and the Tibetans and Mongols fought against his Muslim forces for control of Labrang, until he gave it up in 1927.