Chen Youlin, a Chinese-American scientist, travelled back to China in October 2024 for a month-long holiday, including to celebrate his mother’s 80th birthday. As he prepared to leave, authorities arrested him at the airport in Beijing. For more than 670 days, his wife, Rong Yufang, and other family members have not been able to see or speak with him. “Sometimes I realise I can no longer clearly remember the sound of his voice, and that breaks my heart,” Rong told the South China Morning Post....