This year is the 70th anniversary of the opening of the Sichuan-Xizang Highway and Qinghai-Xizang Highway. Recently, Stories Behind Lens--Photography Exhibition at 70th Anniversary of "Two Roads" Open to Traffic was held in Lhasa. Through pictures at the exhibition, visitors could learn about the connotation of the “Two Roads” Spirit, the difficult process of the construction and the achievements of transportation development in Xizang.