Workers are seen at the construction site of a station of the China-Russia east route natural gas pipeline project in Heihe, northeast China's Heilongjiang Province, Aug. 20, 2019. The construction of the station enters its final stage and is expected to be completed before the end of September. The 3,371-km-long Chinese section of China-Russia east-route natural gas pipeline starts in Heihe and ends in Shanghai. [Photo/Xinhua]