The hot firing test of the first pump rear swing rocket engine achieved success,making China the second country following Russia who has mastered the core technology for the pump rear swing.The test lasted 50 seconds from ignition to shut down.The tested rocket engine was developed by the Academy The hot firing test of the first pump rear swing rocket engine achieved success, making China the second country following Russia who has mastered the core technology for the pump rear swing. The test lasted 50 seconds from ignition to shut down. The tested rocket engine was developed by the Academy