The only nation bordering China, Russia, and South Korea is North Korea.
China and Russia border North Korea to the north while South Korea borders North Korea to the south. Russia's border with North Korea is on the far north east tip and is very small. China's border with North Korea is the largest of the North Korean borders.
Google a map. South Korea borders NORTH Korea.
North Korea, obviously. South Korea hasmaritime borders with China and Japan.
China North Korea South Korea
Afghanistan
North and South Korea are the two countries on the Korean Peninsula.
north Korea
North Korea, South Korea, Russia, China and Taiwan
South Korea is a peninsula, so only the sea borders Korea to the south.
The only country that borders South Korea is North Korea. South Korea is also very close to Japan and China over the water.
North Korea shares a border with China to the north and with South Korea to the south.