East Kowloon line

The route would pass through the hilly Sau Mau Ping residential area, which is not directly served by any local railway service at present.

The project is related to the government-led redevelopment of the East Kowloon area as well as planned residential development in the Anderson Road/Sau Mau Ping district.

At the strategic level, it would serve as an alternative route of travel in the event of a stoppage on the Kwun Tong line, thereby enhancing overall network stability.

[3] In 2022, there was another new proposal from the government with an "elevated trackless rapid system", with the route shortened to between Choi Hung and Sau Mau Ping, without serving Tseung Kwan O.

[4] On 3 January 2023, the Hong Kong Federation of Trade Unions said the government will wholly fund the construction of an elevated trackless rapid transit system in East Kowloon connecting Yau Tong and Choi Hung.