Washington \u00e2\u0080\u0094 American citizen Min Zin has been legally designated by the U.S. State Department as wrongfully detained by China."Secretary Rubio has formally designated U.S. citizen Min Zin as wrongfully detained," Dylan Johnson, assistant secretary of state for global public affairs, said Thursday on X. "We call on Beijing to release all U.S. citizens arbitrarily detained or exit banned in China. The safety and security of U.S. citizens is the State Department\u0027s top priority."This designation follows "an extensive review of the circumstances" surrounding Min Zin\u0027s June 3 detention in Yunnan, a province in southwestern China, the State Department said, adding that he was invited there by the Chinese government for an academic conference.China\u0027s foreign ministry spokesman Lin Jian\u00a0said\u00a0in June that Min Zin was being held on suspicion "of engaging in espionage and endangering China\u0027s national security," without providing further details.Min Zin, founder and executive director of the Institute for Strategy and Policy - Myanmar, is the second American academic to be designated as wrongfully detained in recent months. The other American is Dr. Youlin Chen, whose wife said in a statement Thursday she was glad to see the latest designation."I am glad to see that Secretary Rubio has designated Min Zin as a wrongful detainee," said Youlin\u0027s wife, Dr. Yufang Rong. "It meant a great deal to me when my husband, Youlin Chen, was designated because it means that his freedom is a priority for the Trump Administration. I hope it gives the same comfort to Min Zin and his family."The Institute for Strategy and Policy-Myanmar, or ISP-Myanmar, said Min Zin was wrongfully detained\u00a0while traveling to the city of Kunming for an academic workshop. In addition to his role at the institute, he is a Ph.D. candidate in the Travers Department of Political Science at the University of California, Berkeley, according to ISP-Myanmar.\u00a0"ISP-Myanmar calls for his immediate and unconditional release," the group says. "Academic and research organizations such as ISP-Myanmar should be able to conduct research freely and without fear of intimidation."CBS News has reached out to China\u0027s embassy in Washington, D.C., for comment.Embassy spokesperson Liu Pengyu told CBS News in June that Min Zin\u0027s "legitimate rights have been fully guaranteed."\u00a0His arrest took place a few weeks after President Trump attended a summit in Beijing with China\u0027s President Xi Jinping and called it an "incredible visit." Xi Jinping is planning to visit the U.S. and Mr. Trump in late September. \u00a0