About Shanghai Academy of Spaceflight Technology

Shanghai Academy of Spaceflight Technology

The Shanghai Academy of Spaceflight Technology (SAST), also known as the Eighth Academy of the China Aerospace Science and Technology Corporation (CASC), is a research and production complex headquartered in Minhang District, Shanghai. Formed on 1 August 1961 as the Shanghai Second Bureau of Electromechanical Industry, it initially concentrated on the development of tactical missile systems and was redesignated the Shanghai Academy of Spaceflight Technology in 1993. SAST designs, develops and manufactures a wide range of satellites, launch vehicles, manned spacecraft systems and related products, and has also been involved in civilian products such as automobile air-conditioners and office automation equipment. Together with the China Academy of Launch Vehicle Technology (CALT) in Beijing, it is one of China's two major state-owned launch vehicle manufacturers under CASC — but its identity is broader than rockets alone, extending to weather satellites, crewed-spacecraft subsystems and air-defence missiles.

Identity, headquarters and scale

SAST is a research institute affiliated with CASC, owned by the Chinese central government through that corporation. Its Chinese name is 上海航天技术研究院, rendered in pinyin as Shànghǎi Hángtiān Jìshù Yánjiùyuàn, and it is also known as the Shanghai Bureau of Spaceflight. Its headquarters are in Minhang District, Shanghai. Directory descriptions put its employment at approximately 20,000 staff, including about 6,000 engineers, academicians of the Chinese Academy of Engineering, researchers and senior engineers, backed by dozens of research institutes and manufacturing plants nationwide; a reference infobox lists 16,800-plus employees and an annual budget of 17.1 billion yuan. The two employment figures come from different sources and dates, but they agree on the order of magnitude: SAST is a city-scale industrial academy, not a single laboratory. Space-industry analyses describe it in similar terms, as a massive conglomerate of research institutes, factories and specialised companies, and as a secondary hub for both launch vehicle and spacecraft development within CASC that complements the work of CALT in Beijing and the China Academy of Space Technology (CAST).

That complementary role is deliberate. Analyses of CASC note that this internal distribution of capability — two launch-vehicle centres, in Beijing and Shanghai, and satellite work in both Shanghai and Beijing — is a key feature of China's space industry. SAST has carved out distinct areas of expertise, particularly in satellite development and in specific series of the Long March rocket family, rather than duplicating CALT's heavy-lift and human-rated launcher portfolio.

Origins in 1961 and the road to the SAST name

The institute was established in August 1961 as the Shanghai Second Bureau of Electromechanical Industry — Shanghai Bureau 2 — initially concentrating on tactical missile systems. Its early launch-vehicle history includes the FB-1 rocket: SAST designed and manufactured the FB-1, which launched three military satellites, the details of which have not been published, and SAST was held responsible for the FB-1 failures between 1973 and 1981. That difficult early record is part of the documented history and is worth retaining in a balanced profile, because the academy's later reputation for reliable sun-synchronous launches was built over decades after those beginnings.

In 1993 the organisation was renamed the Shanghai Academy of Spaceflight Technology, the name it still carries. The renaming belonged to the period in which China's aerospace ministry structures were being converted into corporations — the process that ultimately produced CASC in 1999 — and it signalled the Shanghai bureau's evolution from a municipal electromechanical bureau making tactical missiles into a national spaceflight academy making orbital launchers and spacecraft. As China's space programme grew more ambitious in the 1990s and 2000s, SAST's responsibilities grew with it: it became deeply involved in the manned spaceflight programme, contributing key systems to the Shenzhou spacecraft, and it took the lead on major satellite programmes, most notably the Fengyun series of meteorological satellites.

Launch vehicles: the Long March 2D and Long March 4 series

SAST designs, develops and manufactures launch vehicles as well as components. Its established products are the Long March 2D, the entire Long March 4 series and, historically, the FB-1. As of 2024 its launch-vehicle line comprises the Long March 2D, Long March 4B, Long March 4C, Long March 6, Long March 6A, Long March 6C and Long March 12. The Long March 4 family specialised in launching satellites into sun-synchronous orbit, the polar-type orbit ideal for weather satellites such as Fengyun and for Earth-observation satellites; with the Long March 2 for low Earth orbit, the Long March 3 for geostationary transfer and the Long March 4 for sun-synchronous orbit, China assembled a versatile fleet in which SAST owned the sun-synchronous niche.

The operational tempo of those older hypergolic vehicles has been substantial. In reporting on SAST's plans for 2019, the academy was targeting production of 17 launch vehicles to contribute to Chinese plans for more than 30 launches overall that year, with the other 14 planned SAST launches beyond the Long March 6 flights using the older hypergolic Long March 2D and Long March 4B and 4C rockets for launches to low Earth and sun-synchronous orbits from the Jiuquan and Taiyuan centres. The year before, SAST had provided Long March 2 and 4 series rockets for 11 launches, all successful, as China carried out a then-record 39 missions. Those figures give a concrete sense of SAST's role: not the headline heavy-lift launches, but a large share of the routine satellite launch traffic on which China's Earth-observation and meteorological systems depend.

The new generation: Long March 6 and its variants

The Long March 6 marked SAST's entry into China's new generation of launchers. It is a three-stage cryogenic liquid launch vehicle, 29 metres in overall length with a lift-off weight of 103 tons, a 3.35-metre-diameter first stage and 2.25-metre-diameter second and third stages, and a maximum payload capability of about 1,000 kilograms for a 700-kilometre sun-synchronous orbit, according to SAST's own product page. It uses a "three horizontal" test-and-launch mode — horizontal integral test, horizontal satellite-and-vehicle docking, and horizontal transport and erection — to accomplish the quick launch of a liquid launch vehicle, and it supports single-satellite, multi-satellite, constellation networking and replenishment launches to sun-synchronous and low Earth orbits. SAST was tasked with development of the vehicle in July 2008, and the development programme was officially approved in September 2009.

On 20 September 2015 the Long March 6 made its first flight from the Taiyuan Satellite Launch Center, successfully sending 20 satellites into space and setting a new Chinese record for a multi-satellite launch; SAST describes it as the first of China's new-generation launch vehicles to accomplish flight. On 21 November 2017 it carried out its first commercial launch mission, launching three Jilin-1 video satellites, and on 13 November 2019 it sent five Ningxia-1 (Zhongzi) satellites into planned orbit from Taiyuan, in what SAST noted was the vehicle's first low-inclination launch, the 318th mission of the Long March series and the 110th flight of Long March vehicles developed by SAST. A later variant, the Long March 6A, is described as the first new-generation Chinese launch vehicle to combine liquid and solid propellants, using a two-and-a-half-stage design — pairing SAST's liquid core with solid boosters of the kind in which China's solid-propulsion academy specialises.

Long March 12 and the move toward reusability

SAST's newest operational launcher is the Long March 12, a kerolox medium-lift vehicle manufactured by the academy. It is capable of placing at least 12 tonnes of payload in low Earth orbit and at least 6 tonnes in a 700-kilometre sun-synchronous orbit, and it first launched on 30 November 2024 from the Wenchang Space Launch Site — the maiden mission of China's first commercial space launch site in Hainan. Contemporary reporting described the roughly 62-metre, two-stage rocket as China's first 4-metre-class carrier rocket (its body diameter is 3.8 metres) and its most powerful single-core rocket to date, with four first-stage engines of 1,250 kilonewtons thrust each, liquid oxygen-kerosene engines with post-pump gimbaling, and neither boosters nor tail fins. Its 5.2-metre payload fairing — the first 5.2-metre fairing from the academy, according to a SAST research fellow quoted at the launch — is tailored for satellite constellation missions, and the two experimental satellites on the first flight were developed by the private company GalaxySpace.

SAST has followed it with a reusable variant, the Long March 12A, introduced on 23 December 2025. On its first flight the rocket successfully placed its payload in orbit, although the initial attempt to recover the first stage was not successful. The 12A uses methane and liquid oxygen in its first-stage engines, which are built by commercial providers — a notable mixing of the state academy's vehicle with commercial propulsion. Together, the Long March 12 and 12A show SAST's current direction: larger single-core vehicles for constellation deployment, designed from the outset for the high flight rates that internet constellations require, and a first step toward first-stage recovery and reuse.

Satellites: Fengyun and Earth observation

SAST is not only a launcher builder. It designs, develops and manufactures satellites, and its best-known satellite line is the Fengyun meteorological series. Industry analyses identify SAST as the developer of the Fengyun weather satellites, complementing CAST's broader spacecraft portfolio, and the academy also develops spacecraft for the Shiyan series and other programmes — in a September 2022 launch, for example, the Shiyan-16A and Shiyan-16B satellites were developed by SAST while Shiyan-17 was developed by CAST, the trio providing data for land surveys, urban planning and disaster prevention and mitigation.

The Fengyun-3A mission illustrates the detail of that work. Feng Yun-3A, the first satellite of the second generation of Chinese polar-orbiting meteorological satellites, was launched by a SAST Long March 4C — itself an optimised version of the Long March 4B with a restartable upper stage — from Taiyuan. The satellite was developed by SAST, is a three-axis stabilised vehicle measuring 4.4 by 2 by 2 metres with a launch mass of 2,200 kilograms and an operational life of three years, and carries instruments including a ten-channel Visible and Infrared Radiometer. Its objectives were to provide global sounding of the three-dimensional thermal and moisture structures of the atmosphere, and cloud and precipitation parameters, to support global and regional numerical weather prediction. Weather satellites are unglamorous beside lunar probes, but they are among the most socially useful spacecraft China flies, and they are substantially a Shanghai product.

Crewed spaceflight and deep-space contributions

SAST's spacecraft work extends into the crewed programme. While the primary contractor for the Shenzhou spacecraft is CAST and its launcher, the Long March 2F, is built by CALT, analyses of the academy's role record that SAST has been a supplier of systems for China's manned space programme since its inception, providing critical components for Shenzhou including the service module's propulsion and power systems — the module essential for manoeuvring in orbit and for providing electricity through its solar arrays. Its role expanded with the Tiangong space station programme, and SpaceNews reporting on the academy's launch plans noted that SAST also contributed significantly to the orbital module component of the four-module Chang'e-5 lunar sample-return spacecraft — the Chang'e-5 system of orbiter, lander, ascent vehicle and return capsule that performed a robotic lunar-orbit rendezvous to deliver up to two kilograms of lunar samples to Earth. Earlier directory descriptions summarised this breadth plainly: SAST designs, develops and manufactures satellites, launch vehicles, manned spacecraft and related products, a portfolio that few single institutions anywhere match.

Air-defence systems and civilian products

SAST's missile heritage remains visible in its air-defence catalogue. Reference listings record that it produces several air-defence systems: the FN series of man-portable air-defence systems, including the FN-6 and FN-16; the FB series of manoeuvre short-range air-defence systems, including the FB-6 and FB-10; the LY series of medium-range air-defence systems, including the LY-60 (HQ-6), LY-70 and LY-80 (HQ-16); and the HQ-10. This is consistent with its origin as a bureau concentrating on tactical missile systems, and it reminds readers that, like CALT, SAST is a dual-use institution whose space products sit alongside weapons programmes in the same corporate structure.

At the other end of the spectrum, SAST has also been involved in civilian products such as automobile air-conditioners and office automation equipment. That diversification was typical of Chinese defence-industrial academies in the reform era, applying manufacturing capacity to consumer and industrial goods. It forms a small but documented part of the academy's profile, and helps explain the "research and production complex" description used in its directory entries — an organisation that is part design institute, part factory group and part diversified manufacturer.

Organisation and relationship with CALT and CAST

Structurally, SAST operates through dozens of research institutes and manufacturing plants, employing, on the directory figure, about 20,000 people, of whom about 6,000 are engineers, alongside academicians of the Chinese Academy of Engineering, researchers and senior engineers. SpaceNews has described it as owning multiple research institutes and factories. Within CASC it functions as the Eighth Academy, alongside CALT as the First Academy, CAST as the Fifth Academy and the propulsion academies. Understanding SAST therefore requires understanding that division of labour: CALT builds the heavy and human-rated launchers in Beijing; CAST builds most spacecraft in Beijing; SAST, in Shanghai, builds the sun-synchronous and new medium launchers, the Fengyun weather satellites, components of crewed and lunar spacecraft, and air-defence missiles. The redundancy is intentional — two launcher centres give China surge capacity and parallel development paths, as the simultaneous existence of CALT's Long March 7 and 8 and SAST's Long March 6 and 12 families demonstrates.

Why SAST matters

SAST matters because much of China's everyday space infrastructure runs through Shanghai. The weather forecasts informed by Fengyun data, the Earth-observation satellites carried by Long March 2D and Long March 4 rockets, the constellation batches now flying on the Long March 6 and Long March 12, and subsystems aboard Shenzhou and Chang'e spacecraft all trace back in whole or part to this academy. Founded on 1 August 1961 as the Shanghai Second Bureau of Electromechanical Industry, renamed in 1993, headquartered in Minhang District and employing on the order of twenty thousand people, the Shanghai Academy of Spaceflight Technology has grown from a tactical-missile bureau into one of the two pillars of Chinese launch-vehicle production and a satellite builder in its own right. Its recent trajectory — a first 4-metre-class single-core rocket in 2024 and a first attempt at first-stage recovery in 2025 — suggests its next decade will be defined, like CALT's, by constellation flight rates and reusability.