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Propulsion & ComponentsChinaUnlisted

Jiuzhou Yunjian九州云箭

Liquid oxygen/methane rocket engines; reusable engines (Lingyun and Longyun series)

Founded in 2017, Jiuzhou Yunjian develops liquid oxygen/methane rocket engines and was among the earlier Chinese commercial propulsion firms to demonstrate torch ignition, multiple restarts, deep throttling and reuse. On 23 April 2026 the company completed a change of registered address, moving from Beijing to 395 Chunde Road, Minhang District, Shanghai, and renaming itself Jiuzhou Yunjian Space Technology Co., Ltd. Its two product lines are the Lingyun and Longyun engines. Lingyun, the company's first liquid engine, supports multiple restarts, deep throttling and reuse, with more than 10,000 seconds of cumulative hot-fire time. Longyun is a high-thrust recoverable engine; the LY70 variant produces about 686 kN of sea-level thrust per unit, throttles between 32% and 106%, is designed for more than 50 reuses, and had accumulated over 20,000 seconds of hot-fire time by 2025, with 19 units of the series delivered. On the customer side, the first stage of the Long March 12A launch vehicle, developed by SAST under CASC, clusters seven Longyun engines; it flew for the first time on 23 December 2025, reaching orbit with the second stage while the first-stage vertical recovery attempt failed. Commercial customer Rocket Pi also uses the engine on its Yuanxingzhe-1 reusable demonstrator. The company closed a Series C++ round in March 2026 at a post-money valuation of RMB 10 billion, with investors including Shanghai Chuanchuang No.1 Fund and Dalinghaowan Qihang Fund.

Last 12 months

  1. 23 Apr 2026FacilitiesLeadership
    Jiuzhou Yunjian relocates registration to Shanghai Minhang; media report RMB 10bn Series C++ valuation

    The change of registered address was approved on 23 April 2026, moving the company from Beijing to 395 Chunde Road, Minhang District, Shanghai; the entity completed its move by late April. Media reported at the same time that the company had closed a Series C++ round in March 2026 at a post-money valuation of RMB 10 billion, with investors including Shanghai Chuanchuang No.1 Fund and Dalinghaowan Qihang Fund, and that 19 Longyun-series engines had been delivered to date.

    Source: Jiemian · originally published 13 May 2026, 17:14 Beijing time
  2. 07 Apr 2026FundingListing & equity
    Shenzhen-listed Trisun Defence takes a stake in Jiuzhou Yunjian

    Trisun Defence (SZ: 300775) acquired a stake in Jiuzhou Yunjian (Beijing) Space Technology on 7 April 2026. The disclosure did not state the investment amount or the shareholding percentage.

    Source: Sina Finance · originally published 22 Apr 2026
  3. 23 Dec 2025Launch & on-orbitSetback
    Long March 12A debut: seven Longyun engines on the first stage reach orbit, recovery attempt fails

    The Long March 12A launch vehicle flew for the first time on the morning of 23 December 2025 from the Dongfang commercial spaceport test area. Its first stage clustered seven Jiuzhou Yunjian Longyun LOX/methane engines, with a single YF-209V on the second stage. The second stage reached the intended orbit; the first stage encountered an anomaly during vertical landing and was not recovered. The mission was assessed as broadly successful.

    Source: Jiemian · originally published 23 Dec 2025
  4. 23 Dec 2025Development
    Media report: Long March 12A is at least 90% domestically sourced and built to a 50-flight reuse standard

    STAR Market Daily reported that the Long March 12A has a domestic content ratio of at least 90%, and that its first-stage airframe and the Jiuzhou Yunjian Longyun engines were developed to a 50-flight reuse standard. It was the first time a Chinese state-owned launch vehicle used a private company's engines as primary propulsion.

    Source: fund.eastmoney.com · originally published 24 Dec 2025, 00:32 Beijing time
  5. 29 May 2025Development
    Rocket Pi's Yuanxingzhe-1 completes sea-landing recovery test on the first flight-delivered Longyun engine

    Rocket Pi's Yuanxingzhe-1 demonstrator completed a sea-landing recovery flight test at 04:40 on 29 May 2025, running through eight phases: ignition and liftoff, full-thrust ascent, throttling, first engine shutdown, free-fall coast, engine restart, deceleration to a hover above the sea, and soft splashdown. The Jiuzhou Yunjian Longyun engine used, serial LY70005, had completed calibration hot-fire at the end of 2023 and was the first of the series delivered for flight. The test focused on wide-range throttling, restart at high dynamic pressure after an 8-second coast, and flying directly after a full-profile static fire with only light servicing.

    Source: Sina Tech · originally published 29 May 2025, 22:09 Beijing time