The hydrogen tank of LM-5 second core stage passed its cryogenic static test on April 16 at the Beijing Institute of Structural and Environmental Engineering,obtaining all high quality data.The successful test marked that the hydrogen tank of LM-5 second core stage had finished all performance reviews for the working conditions in the liquid hydrogen environment.This was also the first whole tank liquid hydrogen medium static test in the past 20 years in China,breaking the record in test scale as well.As a fuel for the next-generation The hydrogen tank of LM-5 second core stage passed its cryogenic static test on April 16 at the Beijing Institute of Structural and Environmental Engineering, obtaining all high quality data. The successful test marked that the hydrogen tank of LM-5 second core stage had finished all performance reviews for the working conditions in the liquid hydrogen environment. This was also the first whole tank liquid hydrogen medium static test in the past 20 years in China, breaking the record in test scale as well. As a fuel for the next- generation