Dong Sun (Chinese: 孫東; pinyin: Sun Dong; born 1967) is a Chinese scientist in Hong Kong who is currently the Chair Professor and Head of the Department of Biomedical Engineering and Director of the Centre for Robotics and Automation at the City University of Hong Kong. He is also the Secretary for Innovation, Technology and Industry of the HKSAR Government. Sun is a pioneer in microrobotics and biomedical engineering, making numerous breakthroughs in robotic manipulation of cells for precision medicine.