Photo taken on Nov. 6, 2021 shows a train running on Cat Linh-Ha Dong metro line in Hanoi, Vietnam. Authorities of the Vietnamese capital Hanoi inaugurated the China-built Cat Linh-Ha Dong metro line project on Saturday, making it the first metro line in the country to start commercial operation. The project was handed over to Hanoi by its investor, the Vietnamese Ministry of Transport, on the same day. (VNA via Xinhua)
