A worker is seen at the construction site of the Ban Phoukeu Tunnel in Muang Nga of Oudomxay Province, Laos, Sept. 21, 2020. A Chinese railway engineering company on Tuesday drilled through the Ban Phoukeu Tunnel, the last major long tunnel of nearly 9,000 meters along the China-Laos Railway. It marked an important milestone in the construction of the cross-border railway, and laid a solid foundation for the timely completion of the mega project. (Photo by Pan Longzhu/Xinhua)
