Visa launches contactless open-loop payment system across Hanoi metro network, Vietnam March 24, 2026 | Asia Pacific News, News Visa, in partnership with Hanoi Metro Company, has launched a fully interoperable open-loop contactless payment system across the Hanoi metro network, covering Line 2A (Cat Linh–Ha Dong) and Line 3.1 ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password