Moscow has begun the delivery of the S-400 Triumf air defence 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. China is the first foreign purchaser of these air defence systems.