Hà Nội, HCM City must select and master advanced urban railway technol… stockbot 0 12 05.16 15:16 https://vietnamnews.vn/society/1655635/ha-noi-hcm-city-must-select-and… + 0 https://vietnamnews.vn/rss/society.rss + 0 According to the approved plans, Hà Nội will have 10 metro lines with a total length of 417.8km, while HCM City will have 11 lines with 229.1km in total.