2. Gaolan County: the name of the old county. Lanzhou City, Gansu Province. Jincheng County was established in Han Dynasty _ Lan County in Ming Dynasty _ Gaolan County in Qing Dynasty. "Chu Ci Evokes Soul": "Zhu Mingcheng can't sleep at night, and Lan gradually drifts away." Three Kingdoms Ruan Weiji's "Yong Huai" five sentences: "Clear the quilt _ orchid, condense the frost _ grass." Fu Xiao by Jin Chenggong and Sui Dynasty: "The orchid is lush, and the shadow of bamboo is cicada."
3. Gaolan County: North of Lanzhou is Gaolan County, which belongs to "three counties and five districts" in Lanzhou.