China is crucial to mitigating potential Arms agreement between Russia and North Korea, according to an expert.

China holds the key to preventing a potential arms agreement between Moscow and Pyongyang, according to an expert on North Korean military and politics, as Russian President Vladimir Putin and North Korean leader Kim Jong Un prepare to meet in Russia's Far East.

Kim arrived aboard his armoured train at the Russian border on Tuesday morning, crossing the border at Russia's city of Khasan en route to the meeting where the Russi....