Russia begins delivery of S-400 missile systems to China — source

Moscow has begun the delivery of the S-400 Triumf air defense missile systems to China under the 2014 contract, a source close to the Russian system of military cooperation told TASS on Thursday.

"The implementation of the contract has begun, the first shipment has been sent to China," the source said.

According to the source, the shipment includes a control station, a radar station, energy and support equipment, spare parts, various tools and other elements of the S-400 system.