Long March 2D launched Shiyan-30 03 and 04 from Xichang at 06:33 Beijing time on 13 March 2026. CASC confirmed orbital insertion and said the satellites would test Earth-observation technologies. Both the spacecraft and vehicle were developed under the group's Shanghai academy. The rocket used a four-metre fairing. The release did not provide a complete payload configuration, and capabilities are not inferred from the experiment numbers. The team monitored high-altitude winds and prepared weather responses for Xichang's windy, rainy and humid spring conditions, alongside waterproofing checks. These were mission-specific safeguards, not a claim of unrestricted launch capability in any weather. The mission was the 632nd Long March flight. Later in-orbit technology results require subsequent evidence and are not declared complete merely because the satellites reached orbit.