The Yulin Grottoes is 180 km far away from Dunhuang. Yulin Grottoes and Mogao Grottoes are twins Grottoes in Dunhuang. The 42 surviving caves, constructed on the two sharp cliffs facing each other, cover a period of more than 1500 years from the Northern Wei to the Qing Dynasty The Suoyangcheng Ruins used to be a very important stop on the famous Silk Road, initially it was established in 3rd century AD.