Bringing up the world war II to brag about "China Victory" is so very laughable. The only reason why China can get rid of the Japanese in WWII was the Americans' support. Before the help of the Allies, China was completely dominated by Japan, millions of Chinese die in vain without any hope of restoring the country. Back then, it was China + America + Britain vs Japan, 3 to 1, and that was how China won.
In world war II, China was chosen to be helped by the Allies solely due to their tactical position that can help win the war against the Japan. If Vietnam and China were to swapped location at that time, then it would be the China who was "Not even worthy of being treated as a nation, just a property passing from one to another". China was just more lucky than other countries being dominated by stronger countries at that time.
Unfortunately, China is stepping on Japan's old shoes as they are showing greedy ambition to become a new super power in the South China Sea region. But this time, the situation is reversed, It is China who has to fight against many differences forces. When the ASEAN unites and support Vietnam and Philippine, the China will have to go home or face utter humiliation.
A war? please, like China has real guts. The more empty a barrel, the bigger sound it makes.