中国博士后遭美方约谈盘问后自杀身亡，中方提出严正交涉

Core Viewpoint - The article discusses the tragic suicide of a Chinese postdoctoral researcher following an interrogation by U.S. law enforcement, highlighting concerns over the treatment of Chinese students and scholars in the U.S. [1] Group 1 - The Chinese Foreign Ministry expressed deep sorrow over the incident and has formally lodged a strong protest with the U.S. [1] - The Chinese embassy in the U.S. has reached out to the victim's family to provide assistance and support [1] - The Foreign Ministry criticized the U.S. for broadening the concept of national security to politically manipulate and harass Chinese students and scholars, infringing on their legitimate rights [1] Group 2 - The Chinese government urged the U.S. to thoroughly investigate the case and provide a responsible explanation to the victim's family and to China [1] - There is a call for the U.S. to cease discriminatory law enforcement against Chinese students and scholars, and to stop fabricating wrongful cases [1] - The Chinese government affirmed its commitment to taking necessary measures to protect the legitimate rights of its citizens [1]