The reporter learned from the Sixth Academy of China Aerospace Science and Technology Group that on May 15th, the ignition test of China's first liquid rocket engine vertical high-altitude simulation test bench was successfully completed, marking the complete completion of the test bench and its testing capabilities, which will provide important guarantee conditions and technical support for China's manned lunar exploration project. The first vertical high-altitude simulation test bench for liquid rocket engines in China. (Image provided by the Sixth Academy of China Aerospace Science and Technology Group) This test bench has the ability to actively launch throughout the entire process, and its overall comprehensive indicators have reached the international advanced level. It can achieve the ability to continuously conduct high-altitude simulation tests for engines in vacuum working environments below kilopascals for thousands of seconds, greatly improving China's aerospace hydrogen and oxygen engine testing capabilities and levels. It will provide important test support conditions for the development of hydrogen and oxygen engines for China's Long March 10 carrier rocket. It is understood that the project team has achieved real-time health diagnosis of the testing system and fully digital management of the testing process through scaling test verification, digital simulation, and process reengineering, ensuring the reliability of the testing system and meeting the requirements of high-altitude simulation testing for model engines. (Lai Xin She)