Aerial photo taken on Oct. 31, 2018 shows the Nateuy No. 1 Tunnel construction by China Railway No. 5 Engineering Group in Luang Namtha province, Laos. Chinese engineering company completed on Oct. 28, the first over-1,000-meter tunnel along the China-Laos railway. Nateuy No. 1 Tunnel, some 360 km north of Lao capital Vientiane, is located in the northern Lao province of Luang Namtha bordering China in the north. (Xinhua/Liu Ailun)