Construction of the mainly tunnelled Shatin to Central link, has just started, client MTR said this week.
Work began after MTR signed an agreement with the Hong Kong Government for the construction of main works and commissioning.
The line will extend the existing heavy rail network in Hong Kong in two phases to create an East-West rail corridor and North-South rail corridor.
The 17km link consists of 10 stations, including six new ones and three expanded ones, and new tunnels under the harbour in Hong Kong. The £5bn programme is expected to be completed in two phases - in 2018 and 2020 respectively - and should create about 15,000 jobs throughout the construction period.
In the UK, MTR has been shortlisted for the Essex Thameside and Thameslink franchises. MTR also operates London Overground in a joint venture, where it worked with Network Rail and Transport for London to run the network throughout a major upgrade programme.