The name of physicist XIE Jialin （Hsieh Chia-lin） is related to many firsts in China and the world. He invented the world＇s first high energy medical accelerator for electron beam therapy. He developed the first linear accelerator in China. He was the chief designer of the Beijing Electron-Positron Collider （BEPC）, China＇s first collider and large-scale scientific facility and one of the high energy research hubs in the world. He built the Beijing Free Electron Laser facility, on which saturated oscillation was realized for the first time in Asia... For more than half a