​The China-Laos Railway, stretching for more than 1,000 kilometers, connects the city of Kunming in Southwest China's Yunnan Province with the capital of Laos, Vientiane. To 28-year-old Zhou Jiawu, the railway project marks a milestone in his career as a railway engineer. Overcoming countless difficulties, he managed the construction of a mega railway bridge with the highest pier in the world.