The main venue of the Cultural and Natural Heritage Day on June 11 will be Lanzhou, Gansu province. With the theme of "Cultural Relics Protection: Progress with Times and Shared by People", the day is expected to draw people's attention to the historical and scenic wonders across the province. The Silk Road cultural heritage sites extend 5,000 km across country borders. There are 33 sites total, five of which are in Hexi Corridor, Gansu province: Bingling Temple Grottoes, Xuanquanzhi Ruins, the Suoyang city historic site, Mogao Grottoes and Yumen Pass.