How a Vietnamese village schoolboy ends up working with Fields medalist Shing-Tung Yau at China's Tsinghua

Dang Quang Tuan once expected to teach math at a Vietnamese high school. Instead, the 31-year-old is now a postdoctoral researcher at Tsinghua University, working in differential geometry under Shing-Tung Yau, the first ethnic Chinese Fields medalist and a leading architect of modern Chinese mathema