China tests home-grown OS in space to reduce foreign dependence

China has successfully tested its domestically developed OpenHarmony real-time operating system (RTOS) in space, marking a significant step toward reducing reliance on foreign software amid escalating Western sanctions. The Dalian-1 Lianli CubeSat, launched from China’s Tiangong space station, operated for over 1,000 hours using OpenHarmony—a lightweight, open-source version of Huawei’s HarmonyOS—demonstrating enhanced processing speed and operational stability. Key subsystems such as the magnetometer, sun sensor, and attitude unit responded to commands within two microseconds, enabling faster data updates and improved real-time responsiveness compared to previous firmware or foreign software setups. This mission represents a milestone as the first satellite to combine OpenHarmony RTOS with a domestically produced chip, offering a fully home-grown hardware-software solution for spacecraft. Following the success, Chinese researchers introduced national technical standards to promote widespread adoption of OpenHarmony in small satellites, supporting both commercial and research projects. The development addresses challenges stemming from China