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Zhuque-3 chief commander reveals cause of Y1 rocket's failed recovery, saying its data contributed to Y2's success_我的网站

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    ZQ-3 Y1 rocket took off for maiden flight from the Dongfeng Commercial Aerospace Innovation Test Zone at noon time on December 3, 2025. Photo: courtesy of LandSpaceThe cause of an unsatisfying recovery of the Zhuque-3 Y1 carrier rocket has recently been revealed by Zhuque-3's chief commander, who said an abnormal combustion occurred during a landing ignition as the rocket descended toward the ground, state broadcaster China Central Television (CCTV) News reported on Wednesday.
The recovery of the first stage of Zhuque-3, China's first reusable carrier rocket developed by LandSpace, was failed during a test flight back on December 3, 2025, while the second stage of the rocket managed to successfully enter the designated orbit, according to the Xinhua News Agency.
Dai Zheng, chief commander of Zhuque-3, said that when the rocket was about 3.3 kilometers above the ground, it needs to perform a rapid deceleration maneuver by reigniting its engine, a process known as a "landing ignition."
"The ignition sequence was completed and the engine did ignite, but abnormal combustion occurred afterward. The rocket eventually crashed near the edge of the landing pad," Dai said, according to CCTV.
Although the rocket did not achieve a successful recovery, the mission, China's first orbital-class rocket first-stage recovery test, collected telemetry data during the return phase, provided a clearer picture of the flight environment throughout the recovery process, and yielded a large amount of valuable first-hand test data, per CCTV.
Drawing on the data collected from the Zhuque-3 Y1 mission, the development team made improvements to the Y2 launch vehicle.
Eight months after the Y1's unsatisfying recovery, the Zhuque-3 Y2 reusable launch vehicle on Wednesday conducted a flight test, carrying not only a satellite payload but also successfully carried out a major test of China's emerging reusable rocket capabilities. After completing its orbital mission, the rocket's first stage attempted a controlled return and recovery.
The Y2 mission was conducted on the basis of experience accumulated from the previous flight test, with improvements focused on recovery reliability, flight control and engine performance.
LandSpace said it optimized the first-stage landing propulsion scheme by reducing the number of engines used during landing ignition, simplifying system design and improving reliability during the recovery phase. The company also added an autonomous safety control function capable of predicting landing points based on flight conditions and making corresponding safety adjustments.
Global Times
。    “优秀教师都是读出来的，一个不读书的教师，不可能成为优秀教师。”2025年伊始，宝山区全体教师收到一份“宝山教师师德书单”，老师们将组建教师阅读小组，开展多形式读书活动，在阅读分享中，理解教育家精神内涵，践行教育家精神。原来，这是宝山区发布《2025年师德师风建设任务清单》中的首要任务——读书。根据这份清单，全区教师将在2025年分四个季度参与不同主题系列教育活动，引导广大教师深入学习陶行知先生、于漪老师的教育思想，形成广大教师争相贡献教育、服务宝山，优秀教职员工不断涌现的良好局面。

B | 根据《2025年师德师风建设任务清单》，第一季度为“立学敬业·绿色读书季”，除引导广大教师读书外，全区还将以“教育家精神引领下‘学陶师陶’的探索与实践”项目为主课题，面向长三角乃至全国发布师德师风建设研究指南，共同推进提升师德师风建设的研究质量。此外，《清单》中尤其提及要关注教师心理健康与个人福祉，努力提升教师职业认同感、归属感、幸福感。具体做来，宝山区将抓好教师减负工作，严控进校园活动数量，为广大中小学教师营造安心、静心、舒心的从教环境，让教师工作回归本源；此外，宝山区还将开展教师关爱行动，畅通教师职业发展通道，保障教师收入待遇，整合本区各类场馆资源，面向教师提供优惠和实行优待政策。此外，宝山区还将开发教育家精神课程教材资源，从“铸师魂”“修师德”“树师表”“提师能”等维度，分层分类开展师德师风专题培训，组织教师参加革命传统教育、国情社情考察等，引导教师在理论与实践中涵养高尚师德和教育家精神。栏目主编：唐闻佳来源：作者：文汇报张鹏。