Chinese semiconductor researcher Wang Danhao died at the University of Michigan last month, shortly after being questioned by US federal law enforcement.Liu Pengyu, a spokesman for China’s embassy in Washington, confirmed to the South China Morning Post in an email on Monday that Wang had taken his own life.“We are deeply distressed by this tragedy,” Liu wrote, adding that the US had “overstretched” the concept of national security and subjected Chinese students and scholars to unwarranted...