The detention of a Chinese spy in Belgium, and his transfer to U.S. custody this week, is a landmark victory for the FBI and the U.S. intelligence community. Still, that spy won’t likely spend long in U.S. prison. He’ll probably be traded for U.S. spies in Chinese custody.

As reported by the Washington Post, Yanjun Xu of China’s Ministry of State Security intelligence service, was detained in Belgium after believing he was traveling to meet a U.S. supplier of aviation-related technologies. Unfortunately for Xu, he was meeting with the FBI, which had engaged in a classic “dangle” operation. Xu has now been indicted in federal court for a number of espionage-related charges.