Overview
- The Long March 7A broke apart about 85 seconds into flight on Monday, Aug. 10, destroying the vehicle and its ChinaSat‑4B (Zhongxing‑4B) communications satellite.
- China’s state media and the China Academy of Launch Vehicle Technology confirmed the mission failed hours after launch and said the cause is under official investigation.
- Amateur videos and eyewitness accounts show an in‑flight breakup at low altitude, and analysts including Jonathan McDowell have pointed to either a structural failure near maximum dynamic pressure or possible activation of a flight‑termination system as candidate causes.
- The rocket’s first stage and boosters use YF‑100 kerosene‑oxygen engines that are also used on other Chinese vehicles, which raises concern that the probe could trigger component checks or operational pauses for related launches.
- The accident is one of several Chinese launch failures in 2026 and follows the 7A’s maiden‑flight failure in 2020 after a run of successful missions, raising pressure on engineers to identify a root cause before upcoming flights such as the Chang’e‑7 campaign.