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Chen Xu, party secretary of Tsinghua University, said the university paid close attention to the development of medical sciences, and it would further develop the cross-disciplinary subjects between life sciences and other subjects, and foster new momentum.

Chicago Tribune said Monday that the suspect's lawyers said in a filing that "Christensen decided to formally withdraw" his mental-health defense notice.

Chen, who started his career in 1989 as a teacher at Tsinghua University, was appointed as a member of the CAST's Party Committee last year. He was placed under investigation in January.

Chen Zhiwen, a member of the expert group of the National Education Examination Committee, said in addition to using technology such as face recognition, education authorities have cooperated with the public security department to carry out strict identity screening for art school applicants. Face recognition is required before online video examinations.

Chen added that the goal is to promote friendly exchanges between the two sides, and to promote political, economic and cultural exchanges.