China's Belt & Road ambitions of a continuous high-speed rail connection from its Yunnan border province all the way down to Singapore have been dealt a blow with the decision by Malaysian Prime Minister Mahathir Mohamad to scrap the Kuala Lumpur-Singapore High-Speed Rail project. In addition to seeing the rail project as an element of its southeast Asia connectivity agenda, China hoped to win the tender for its high-speed trains to run on the line. Tenders had not yet been signed for the rolling stock provider, while local firms had been selected to construct the rail line.

More problematic is that Mahathir has also called into question the future of the East Coast Rail Link, a China-led project where construction began in August 2017. The US$13.1 billion project comprises 23 stations, starting at Port Klang on the west coast near Kuala Lumpur, crossing the Malaysian peninsular, and then heading north up the coast to end at Kelantan near the Thai border.

A framework finance deal and construction agreement was signed in November 2016, with state-owned China Construction Communications Company as the main engineering, procurement and construction contractor. Project completion on the 668 kilometre line is scheduled for completion by 2024.

On 1 June 2018, in response to media queries about the reported cancellation of the Kuala Lumpur-Singapore High Speed Rail project, Singapore Transport Minister Khaw Boon Wan issued a statement. "Following media reports that Malaysia has decided to terminate the HSR, Singapore has requested the Malaysian government through diplomatic channels to clarify Malaysia's position on the project," he said. "We have informed the Malaysian government that Singapore is continuing to incur costs on this project, as it awaits Malaysia's clarification, and that in the event Malaysia terminates the project, Singapore will study the implications and exercise our rights (including any right to compensation for expenses incurred) in accordance with the terms of the HSR Bilateral Agreement."

He added that Singapore still believes that a high-speed rail link between Singapore and Kuala Lumpur would be in the economic mutual interest of the two countries. "Singapore continues to support the HSR project and to fulfil all its obligations under the agreement," said Khaw, who is also coordinating minister for infrastructure.

Elsewhere in the region Xinhua News Agency reported on 1 June that Thailand's transport minister, Arkhom Termpittayapaisith, said that the construction of a Thai-Chinese high-speed rail link between Bangkok and Nakhon Ratchasima in northeastern Thailand is expected to get fully started early in 2019 following a tender process later in 2018.

Arkhom, who co-chaired the 24th meeting of the Joint Committee on Thailand-China Cooperation on Rail Project with Ning Jizhe, deputy head of China's National Development and Reform Commission, said the construction of the main sections of the first phase of the high-speed rail from Bangkok to northeastern province of Nakhon Ratchasima will start in March 2018.

In addition, the 350 kilometre high-speed rail link between Nakhon Ratchasima and Nong Khai, which faces the Lao capital Vientiane across the Mekong River, will be implemented by Thailand with China acting as consultants in terms of feasibility study and design, Arkhom was quoted as saying.