Well there is no point in talking scenarios with some of you, now I am Chinese fan boy. Well my POV stands as it will be a logistical suicide to go to war with enemies who can stand up to you and fight on 2 fronts. Which ever army had tried it in the past had end up losing. Looking at it from todays prospective, Why do you think that the Germans lost in WW1, the Turks lost in WW1, Hitler lost in WW2, the Japanese WW2, The Americans Vietnam as they opened many fronts, the Americans in Iraq, in Afghanistan, the Russians in Afghanistan. The last 3 wars that I have mentioned are not 2 front wars, but still wars which are hard to fight because their supplies are stretched to the limit.
End of the discussion from my side.