Tourists visit the Jiayu Pass in Jiayuguan City, northwest China's Gansu Province, Jan. 24, 2015. China has poured 2.03 billion yuan (about 328 million US dollars) in maintaining the Jiayu Pass, including the construction of a world culture heritage inspection center and a heritage protection and display project since 2011. Most of the maintenance project has been finished. (Xinhua/Fan Peishen)