Xu, a senior officer with China's Ministry of State Security (MSS), is accused of seeking to steal trade secrets from leading aviation firms, top Justice Department officials said. Xu recruited experts to travel to China, often under the guise of asking them to deliver a university presentation and passing himself off as an official with the Jiangsu Science and Technology Promotion Association. Xu often exchanged information with individuals at Nanjing University of Aeronautics and Astronautics, one of the top engineering schools in China, which has significant influence over the country's aerospace industry, according to court documents. Xudong Yao, also known as “William Yao,” 57, is a naturalized United States Citizen wanted for his alleged involvement in the theft of proprietary information from a locomotive manufacturer in Chicago, Illinois. Yao is currently at large and believed to be residing in China. On November 18, 2015, Yao traveled from China to O’Hare International Airport in Chicago. At the time, he had in his possession the stolen trade secret information, including nine complete copies of the suburban Chicago company's control system source code and the systems specifications that explained how the code worked, the federal indictment states. Yao is charged with nine counts of theft of electronic files. Yi-Chi Shih, an electrical engineer and a University of California, Los Angeles professor, was found guilty in June 2019 by a Los Angeles jury on 18 counts related to smuggling computer chips containing military secrets to China. In July 2019, federal agents arrested husband and wife couple Yu Zhou, 49, and Li Chen, 46, currently of San Diego, California, for stealing medical secrets from the former employer. The couple conspired to, attempted to and did steal scientific trade secrets related to exosomes and exosome isolation from Nationwide Children's Hospital's Research Institute for their own personal financial gain. The husband and wife allegedly founded a company in China in 2015 without the hospital's knowledge. While Zhou and Chen continued to be employed by Nationwide Children's, they marketed products and services related to exosome isolation through their Chinese company. In September 2019, they were charged with crimes related to stealing exosome-related trade secrets concerning the research, identification and treatment of a range of pediatric medical conditions. On September 11, 2019, Yujing Zhang was found guilty on counts of unlawfully entering a restricted building and making false statements to a federal officer. On September 16, 2019, Zhongsan Liu was arrested in Fort Lee, New Jersey by federal agents and charged with conspiracy to commit visa fraud for his involvement in a conspiracy to fraudulently obtain U.S. visas for Chinese government employees.