The first batch of Internet satellites for China's Guowang megaconstellation launched Monday on the country's heavy-lift Long March 5B rocket.

The satellites are the first of up to 13,000 spacecraft a consortium of Chinese companies plans to build and launch over the next decade. The Guowang fleet will beam low-latency high-speed Internet signals in an architecture similar to SpaceX's Starlink network, although Chinese officials haven't laid out any specifics, such as target markets, service specifications, or user terminals.

The Long March 5B rocket took off from Wenchang Space Launch Site on Hainan Island, China's southernmost province, at 5:00 am EST (10:00 UTC) Monday. Ten liquid-fueled engines powered the rocket off the ground with 2.4 million pounds of thrust, steering the Long March 5B on a course south from Wenchang into a polar orbit.

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China's new Long March 12 rocket made a successful inaugural flight Saturday, placing two experimental satellites into orbit and testing uprated, higher-thrust engines that will allow a larger Chinese launcher in development to send astronauts to the Moon.

The 203-foot-tall (62-meter) Long March 12 rocket lifted off at 9:25 am EST (14:25 UTC) Saturday from the Wenchang commercial launch site on Hainan Island, China's southernmost province. This was also the first rocket launch from a new commercial spaceport at Wenchang, consisting of two launch sites a short distance from a pair of existing launch pads used by heavier rockets primarily geared for government missions.

The two-stage rocket delivered two technology demonstration satellites into a near-circular 50-degree-inclination orbit with an average altitude of nearly 650 miles (about 1,040 kilometers), according to US military tracking data.

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