Preliminary design of Hangzhou Rail Transit Line 3 approved, China August 15, 2020 | Asia Pacific News The preliminary design of Phase I of Hangzhou Rail Transit Line 3 has been approved. It will span 4.7 km and cover four stations. It will be developed at an estimated investment of CNY7.30 billion. Co... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password