Post-Russia's announcement, China has reportedly said that Moscow was forced to make such a decision as it "is worried that the delivery of S-400 missiles at this time will affect the anti-pandemic actions of the People's Liberation Army and does not want to cause trouble to China."
In 2018, China received the first batch of S-400 missile, a military diplomatic source told Russia's TASS news agency.
The S-400 air defence missile system is considered the most advanced of its kind in Russia, capable of destroying targets at a distance of up to 400 kilometres and a height of up to 30 kilometres.
Russia's suspension of S-400 missiles to China comes after Moscow had earlier accused Beijing of spying, despite the two countries enjoying considerably good relations over the years.
Russian authorities have found Valery Mitko, president of its St Petersburg Arctic Social Sciences Academy, guilty of handing over 'classified materials to the Chinese intelligence,' TASS reported.