China has deployed its S-400 missile defence system on the Indian border. The S-400 missiles are the strongest and the simplest missile defence system at current. It has been presently deployed alongside the Line of Precise Management by China. That is the most recent motion on the Chinese language aspect in a collection of escalations as the stress between India and China escalates. Russia had bought the S-400 system to China in 2018. China already owns the S-300 missile system too.