Six of the massive Chinese Y-20 transport aircraft which belong to the PLA flew into Belgrade, Serbia on Saturday, then returned to China. Such a huge deployment is most unusual. Global Times reports: “The mission of the Y-20s to Serbia remains unknown, with thedrive.com speculating that the aircraft could be delivering the FK-3, the export version of the Chinese HQ-22 surface-to-air missile system, to Serbia.” They add that “it could be the largest overseas operation by the Chinese domestically developed large transport plane yet, displaying the country’s strategic transport capabilities….. The mission reflects a significant improvement in the PLA Air Force’s long-range strategic transport capabilities, as well as the large transport aircraft’s logistics support and maintenance capabilities in intercontinental flights.”