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Recently, the Free-Electron Laser (FEL) team at the Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences experimentally demonstrated their independently proposed concept of Direct-Amplification Enabled Harmonic Generation Free-Electron Laser (DEHG-FEL)?for the first time, and successfully achieved its lasing and stable operation. This marks a key milestone toward realizing X-ray FEL sources operating at megahertz (MHz) repetition rates.?The results were?published in?Physical Review Letters?and were highlighted as an Editors’ Suggestion.