Feds abruptly drop visa fraud charges against Chinese military scientists Prosecutors provided no explanation for the dismissals, but they reportedly came after evidence surfaced that a visa application question was not clear enough for Chinese military scientists to answer accurately. In this Thursday, April 14, 2016 photo, a Chinese national flag flutters against the office buildings at the Shanghai Bund shrouded by pollution and fog in Shanghai, China. (AP Photo/Andy Wong, File) SAN FRANCISCO (CN) — Federal prosecutors this week abruptly dropped fraud charges against three Chinese researchers accused of lying on visa applications about their ties to the Chinese military. In tersely worded documents filed in two federal court cases Friday, the Justice Department asked for charges to be dismissed against Chen Song, a former Stanford researcher, and Xin Wang, who worked at a U.S. government-funded lab at the University of California, San Francisco.