A renowned mathematician who is also part of China’s Qian clan – a surname linked in the annals of Chinese scientific history to national pioneers in science and engineering – has become the latest US-based scientist to return to China. After more than 40 years in the United States, Qian Hong has left his endowed professorship at the University of Washington to join the prestigious and private Westlake University in eastern China. Qian’s appointment last month as a full-time chair professor with...