According to Chinese sources there is increasing interest of the foreign states (Middle east and African countries especially) in buying Chinese drones including combat ones. The most popular among them is Cai Hong (Rainbow) UAV series. This include such a types like e.g. the armed CH-3 and CH-4 medium-altitude drones.
Tensions are rising in the airspace due to provocative and very unprofessional actions performed by Russian pilots. On Apr. 29, a Russian Su-27 Flanker “barrel rolled” over the top of a U.S. Air Force RC-135 which was flying a recon mission in international airspace above the Baltic Sea.