United States of America vs China - Conventional War

I got a little sidetracked these past few days and wasn't able to finish my exposition on A2/AD so I will use R3 to respond to my opponent's arguments. Thank you very much for the opportunity to examine these arguments. We agree that any attack through South Korea would be a stalemate for the US at best and a complete disaster at worst. The only thing they could do would be to draw the attention away from Korea and then attack. I don't think this would be possible considering how well established the American presence on Korea is and also how strong the North Korean position is. Any attack against the North would likely buy enough time for the Chinese to shift their forces to react to any problems. With the US Navy at bay the Chinese have a significant advantage of not having to deal with the force projection that Aircraft Carriers bring to the equation. My opponent asks, "Where would China invade?" China doesn't have to invade the US in order to hurt it. China and Russia would focus their attentions on Eastern Europe, the Middle East and also on Southeast Asia. Because of the massive amount of manpower available to China fighting a war on such a wide front would not be an issue. By attacking in Eastern Europe they divert the attention of the US and it's allies to protect their NATO alliance. The majority of their forces would need to be committed to slowing the advance through eastern Europe. By attacking the Middle East China can control a region that contains the majority of the world's proved oil reserves. This would deprive America of oil forcing them to decide between their military and their economy. The economy runs on oil, so does the military machine. They would need to enact strict rationing which would increase prices. Russia is no slouch. Recently it was leaked that the Pentagon is unsure it could defeat Russia in eastern Europe.[1] Note, this is them unsure of their ability to defeat Russia only not including the might of China as well. While it is true that Germany, the UK and France bring some more punch to the table, but nowhere near what China does. China, after invading eastern Europe and the Middle East could easily prepare for an invasion through central and south America. China has purchased five Zubr class LCACs for invading by sea.[2] These are the largest hovercraft transports in the world. America would need to fortify every coastline they have, nearly 96,000 miles of it.[3] Are you prepared for the massive losses of attacking such advanced anti-air defenses? Every nation America has ever imposed a no fly zone and air superiority over has had mediocre AA at best. Unfortunately it isn't always as easy as hiding in buildings and bushes. The Chinese don't need to take the city by simply marching in. Bombardment with artillery and bombs soften up targets before invasion. The US army hasn't been under siege in a long, long time, since at least the battle of Khe Sanh. In this battle both sides declared victory.[4] To assert that they will "simply" have the advantage is an underestimation of the conflict and capabilities of both sides. I will have my updated argument in the next round.Sources[1]http://www.thedailybeast.com...[2]https://en.wikipedia.org...[3]http://oceanservice.noaa.gov...[4]https://en.wikipedia.org...