Russia is a key source of energy and raw materials for China. It's also China's main land neighbor, so a hostile Russia right next door would not be good.
Long answer is if you look more into "Mackinder's World Island theory". It's a about a single block dominating the Eurasian continent being able to overwhelm the naval superiority of major sea nations like the US/UK.
Russia is a key source of energy and raw materials for China. It's also China's main land neighbor, so a hostile Russia right next door would not be good.
Long answer is if you look more into "Mackinder's World Island theory". It's a about a single block dominating the Eurasian continent being able to overwhelm the naval superiority of major sea nations like the US/UK.