Why is China delivering missiles to Serbia?

Six Chinese Air Force Y-20 transport planes made a delivery of HQ-22 surface-to-air missile systems to the Serbian military in what's being referred to as a "veiled operation."

According to the AP News report, Serbia, a Russian ally, received the delivery of the anti-aircraft weapons during a period in time where such a delivery holds especially ominous connotations, given the ongoing tumult between Russian and Ukraine.

"The Y-20s' appearance raised eyebrows because they flew en masse as opposed to a series of single-aircraft flights," wrote The Warzone online magazine in a quote circulated by AP News. "The Y-20′s presence in Europe in any numbers is also still a fairly new development."

The AP reports that the Chinese cargo planes were spotted at Belgrade's Nikola Tesla airport and that Serbia's defense ministry did not respond to requests for clarification.

In the Global Times coverage of this operation they point out that this "could be the largest overseas operation by the Chinese domestically developed large transport plane yet, displaying the country's strategic transport capabilities," according to writers Liu Xuanzun and Guo Yuandan.

According to The Drive flight trackers first noticed the Chinese cargo planes on Friday as they headed west in Turkish airspace towards Serbia.