BEIJING, Sept. 18 (Xinhua) -- In May 2026, Wu Yuyang, a young college student working as an intern in east China's Jiangsu Province, traveled to Qingdao in the neighboring Shandong Province to donate hematopoietic stem cells. Meanwhile, a mother of a three-year-old child was waiting for cells that might give her a second chance at life. About three months later, Wu received an unexpected piece of news: a fellow s