Musk will test the hyperloop: speeds are expected to reach the speed of sound

Musk tweeted Saturday night about the progress of the hyperloop project. The project hopes to achieve high-speed transportation in pipelines at speeds of 700 miles (about 1,127 kilometers per hour).

The upcoming test can reach half the speed of sound, about 381 miles per hour, and complete the braking in a distance of 1.2 kilometers. Musk said that it is very difficult to complete this task, and if it goes wrong, it can turn into a pile of scrap iron. But he's excited about the test.

Musk's fans are also divided, some are looking forward to it, others are questioning.

Musk released the design of the hyperloop in 2013, and then a number of startups hope to develop their own hyperloop with this plan. Last October, the American Association of Public Transportation revealed that Musk was also preparing to launch his own hyperloop project in Maryland. Musk said at the time that it could not release a full statement until several months later.