I am not too worried. The more china develops economically, the less they will be able to wage war even if they want to. Businessmen will begin to take over key party leadership positions. All of that economic lobbying will make it extremely difficult for China to act overly aggressively because it will hurt the economy.
Capitalism and free trade = peace.
All countries have interests. When those interests coincide or when one side is much weaker than the other you will have peace. When interests do not coincide, the differences are irreconcilable and there is not an overwhelmingly dominant power in the equation you will often have war. "Capitalism and free trade = peace" sounds great but it is nonsense.
This was the accepted wisdom for two decades before world war 1.