Toolai River is the only surface river in Jiayuguan City, Gansu Province, originating from the middle section of Qilian Mountain in Qinghai Province to Laizhang, and flowing out of the ice ditch through Jiayuguan, Jiuquan, Jinta and then into the Heihe River, which is a tributary of the Heihe River water system. The river is very turbid, there is a very large river bend, the turbid river is running continuously, very spectacular.