October 17, 2017 - China Launches Communication Satellite

The satellite you're looking for is likely Shijian-13, though it launched on April 12, 2017, not October 17th. China sent it into orbit aboard a Long March 3B/E rocket from Xichang Satellite Launch Center. It became China's first high-throughput communications satellite, delivering up to 20 Gbps of Ka-band capacity. It also introduced electric propulsion for station-keeping, a first for Chinese geostationary satellites. There's much more to this mission than the launch date alone.

Key Takeaways

• China launched the Shijian-13 communications satellite on April 12, 2017, not October 17, from Xichang Satellite Launch Center.
• The satellite was carried by a Long March 3B/E rocket into Geosynchronous Transfer Orbit successfully.
• Shijian-13 featured 26 Ka-band beams delivering up to 20 Gbps, surpassing all prior Chinese communications satellites combined.
• It became the first Chinese satellite to use electric thrusters for geostationary station-keeping, improving fuel efficiency and lifespan.
• The satellite supports civilian broadband services while carrying dual-use military communications and experimental laser communication payloads.

Shijian-13: China's First High-Throughput Communications Satellite

China launched the Shijian-13 communications satellite on April 12, 2017, atop a Long March-3B rocket from the Xichang Satellite Launch Center in Sichuan Province.

You'll find this satellite notable for several reasons — it's China's first to use electric propulsion for station-keeping at 110.5°E longitude and carries the country's first domestic laser payloads for space-to-ground communication experiments.

The satellite weighs 4,600 kg and delivers 26 Ka-band user beams with beam steering capabilities covering China and offshore areas.

Its 220 kg high-throughput payload and hybrid propulsion system — combining liquid-fueled thrusters with electric propulsion — mark a significant technological leap.

Built by CAST on a DFH-3B or DFH-4S bus, it's designed to operate for 15 years. During its operational phase, the satellite is designated Zhongxing-16 and will be managed by China Satcom.

The satellite's high-throughput payload is capable of delivering 20 Gb/s capacity, supporting services such as distance learning, telemedicine, and internet access for terrestrial, airborne, and maritime users.

What Shijian-13 Was Built to Do

Designed to serve as China's most capable communications satellite at the time of its launch, Shijian-13 packed enough Ka-band broadband capacity to outperform all previous Chinese communications satellites combined, delivering data at up to 20 Gbps across 26 user beams covering China and its offshore areas.

You can think of its mission as tackling civilian connectivity on multiple fronts — bringing internet access to planes, high-speed trains, and ships while supporting distance learning and telemedicine.

Emergency resilience was equally central to its design, enabling rapid airborne and maritime communications when ground infrastructure fails. Much like how cloud gaming platforms such as GeForce NOW extend access to demanding applications for devices that otherwise lack the capability, Shijian-13 extended high-speed connectivity to regions and platforms that previously lacked reliable access.

Beyond civilian use, it also supported military communications. By integrating broadband, multimedia, and data relay services into a single platform, Shijian-13 represented a major leap forward in China's satellite communications capabilities. It was also the first Chinese satellite to use electric thrusters for station-keeping, marking a significant milestone in propulsion technology. Following successful in-orbit tests, the satellite received its operational designation of Zhongxing-16.

The October 2017 Launch From Xichang Explained

On April 12, 2017, at 11:04 UTC, a Long March 3B/E rocket lifted off from Launch Area 2 at Xichang Satellite Launch Center, carrying Shijian-13 into Geosynchronous Transfer Orbit.

This Xichang launchpad has supported 3B series flights since 1996, making it China's premier site for GTO missions. Orbital insertion timing proved precise, and officials recorded the mission as a complete success.

Three key facts define this launch:

1. Flight Y43 marked the 43rd Long March 3B mission in the series
2. Xichang's southern Sichuan location provides an equatorial advantage for GTO trajectories
3. Shijian-13 joined a long line of successful payloads, including SinoSat 6 and Eutelsat W3C

No anomalies were reported, continuing the Long March 3B/E's strong reliability record. The vehicle's third stage is powered by two YF-75 engines burning liquid hydrogen and liquid oxygen to achieve the high energy needed for GTO insertion.

CASC also operates more modern launch vehicles in its fleet, with the Long March 8A serving as a newer rocket designed to support missions such as the SatNet LEO Group 17 launch scheduled for December 25, 2025.

How Shijian-13 Advanced China's Dual-Use Space Ambitions

Launched in April 2017, Shijian-13 pushed China's satellite capabilities forward on multiple fronts, blending civil broadband services with technologies that carry clear dual-use potential.

You can see this dual-use integration throughout its design: Ka-band multi-beam coverage extending across China and offshore areas, laser communication experiments enabling high-speed data relay, and electric propulsion extending operational life to 15 years.

These aren't just commercial features. They directly support military communications, emergency response, and strategic reach across maritime and airborne platforms.

Operating as Zhongxing-16 at 110.5°E under China Satcom, the satellite serves planes, trains, ships, and vehicles while quietly advancing PRC capabilities in optical communications and satellite longevity. This mirrors the approach taken by commercial station developers like Axiom Space, whose modules integrate guidance, navigation, and control systems directly into primary structure to avoid dependency on external infrastructure.

It also set the stage for more assertive follow-on missions like Shijian-21 and Shijian-25. Shijian-21 demonstrated this progression concretely by docking with a defunct Beidou satellite and moving it to a graveyard orbit, showcasing in-orbit towing as a capability with unmistakable dual-use implications.

Shijian-13's Legacy in China's High-Throughput Satellite Race

Shijian-13's dual-use contributions didn't emerge in isolation—they anchored China's broader push to close the gap with global high-throughput satellite leaders. Through deliberate industry policy, CAST and China Satcom transformed domestic satellite capabilities, influencing satellite diplomacy by showcasing China's self-reliant Ka-band expertise internationally.

Shijian-13 left three defining marks on China's HTS race:

1. It validated electric propulsion for geostationary station-keeping, reducing reliance on chemical systems.
2. Its 20 Gbps capacity surpassed all prior Chinese satellites combined, resetting domestic benchmarks.
3. Space-to-ground laser communication experiments opened new high-speed data frontiers.

These milestones directly shaped successor missions, including Shijian-18, and accelerated China's satellite internet era. You can trace today's expanding broadband satellite constellation directly back to Shijian-13's foundational breakthroughs. This trajectory mirrors the geopolitical urgency first ignited in 1957, when the Soviet Union's Sputnik launch prompted the United States to establish NASA and ARPA as direct institutional responses to the dawn of the space age.