Qīdábǎn
Jiāyù Pass guards a narrow stretch of the Hexi Corridor between the Black Mountains and the Qilian range. In 1372 the Ming general Feng Sheng chose a site at the western foot of Jiayu Mountain for a fortified pass. Walls and outworks were added over generations, forming a defence line that also drew on the gorge of the Taolai River and the surrounding mountains.