During his interactions with netizens on the X platform, Tesla CEO Elon Musk made a bitter mockery of the slow progress of California's high-speed rail project.

The official account of "California High-Speed Rail" posted on platform X: "The Fresno River Viaduct in Madeira County is one of the first high-speed railway structures built. Nearly 1600 feet long, the high-speed train will travel on the riverbed and run parallel to the BNSF railway."

One X user commented: "It cost $9 billion."

Musk responded: "Boring could do this for less money," referring togameshowsontvHis tunnel digging company.

Another X user posted sarcastically: "It took 410 days to build the Empire State Building. But in Fresno, California, the high-speed railway bridge took just 5840 days (16 years) to build. Please applaud."

Musk responded: "This is not a good sign."