洮河
By late 1872, Qing armies led by general Zuo Zongtang had destroyed the Hui rebels in the regions to the east of Hezhou (Shaanxi and Ningxia), and reached the Tao River, separating today's Linxia Prefecture from its eastern neighbor, Dingxi. Zuo's attempts to gain a foothold west of the Tao River were stymied by Ma Zhan'ao's Muslim fighters. But Ma realized that he could not hold against the Qing armies forever, and in early 1873 he sent his son, who was soon to become known as Ma Anliang, to Zuo's headquarters in Anding to negotiate switching sides. Pursuant to the agreement, Ma Zhan'ao surrendered Hezhou to the government forces, executed those locals who objected to the surrender, and joined the government side himself, to fight against the rebels farther west. In exchange, Zuo Zongtang treated the Hezhou Muslim community much better than he had the people of Ma Hualong's Jinjipu, or than he would treat the defenders of Suzhou later this year.