Putin has been keen to deepen ties – whether they be economic, political or military – with this Chinese counterpart Xi Jinping. Russian S-400 missiles have come under mass scrutiny from the White House in recent years after several nations, including India and Turkey, purchased them over the American alternative. News that Moscow is now dedicated to training its customers in using the missile systems will also be of concern to President Donald Trump.
A military source told TASS: "About 100 military servicemen from the Chinese People's Liberation Army who will maintain the second S-400 regiment set, completed a training course to use the S-400 systems in July and returned to their home country.”
More worryingly for the US, the training course was completed just as a second S-400 regiment was set to be delivered.
A Russian government source added: “A transport vessel with the first batch of hardware from the second S-400 regiment set for China has taken to the sea from the port of Ust-Luga on the Baltic coast.”
The news may prompt concerns that Russia and China are growing ever closer on a military level in light of US aggression.
Putin has won the missile battle (Image: GETTY)
China and Russia are deepening military ties (Image: GETTY)
The participation of a Chinese military destroyer in a vast Russian naval parade came days after the two nations carried out a joint air patrol near South Korea.
According to analyst Alexey Muraviev, the two also share crucial intelligence and carry out joint military training.
He added: “The deepening of strategic ties between Russia and China may prove key in shaping the western Pacific's geopolitical and geostrategic landscape over the next two decades.
“At this stage it is unlikely that Russia and China will enter a formal alliance – both nations are keen to retain some independence.
“But Western observers are sceptical about how long this will remain the case.”
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The Russian S-400 missile system in question (Image: GETTY)