A film about the construction of the Chian hydroelectric power station in the south of Vietnam with the participation of Soviet specialists. Danim hydroelectric power station. Thermal power plants Tkhudyk and Chanok. Dongai River. Meeting of the headquarters for the construction of the Chian hydroelectric power station. Present: Energy Minister Chiang-Wan Zan, chief Soviet expert Yu. P. Kirsanov. Prospecting, blasting, concrete, excavation, installation and other works on the construction of hydroelectric power plants. Boat on the river. Buffaloes in the river. Pineapple trees and papaya. Ho Chi Minh City, Bien Hoa. Wunktau oil fields. Drilling rig at sea. Meteorological station. The girl bathes in the river. Boy on a buffalo. Langa river. Sugar factory. Monkey on the tree. Hanoi-Chian Highway. Port of Ho Chi Minh City. Barge on the river. Newsreel footage of 1975. Mine clearing work after hostilities. 1981 year. Design and survey work with the participation of Soviet specialists.