Yes, it will be connected with Bangkok HSR (currently under-Construction, expected to be finished in 2023) part of China-Thailand HSR Projects.
Also will be connected with China-Cambodia HSR (via Bangkok to Phnom Penh & Sihanoukville all the way to Kunming, China)
Singapore itself very keen to be Connected with Trans-Asian HSR built by China.
Malaysia is very labile, like little girl.
But with the Operation of HSR in Laos, Thailand, & Indonesia. Malaysia of course doesn't want to get left behind.
They will restart the project very soon
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