Let's get serious folks. China is under siege by the West and many neighboring countries are becoming adventurous and hostile. We are definitely in a defensive position right now. Our territory, islands and waters have been invaded by aggressors India, SE Asian countries and Japan.
Our biggest advantage is that our military technology is improving so fast that by the end of the decade we would have the capability to burst through the first island chain, even if both US navy and JMSDF try to stop us. This is the reason why we haven't immediately reacted to teach them a lesson yet.
We would be in a position to take out India and Vietnam simultaneously by around mid-decade. Once our WS-18 high bypass engine are mass produced, we can mass produce Y-20 heavy transport (prototype flying 2012) and H-6K bombers (existing H-6K in service bombers use imported engines). With these platforms, PLA will be able to project power, occupy and hold territory in Vietnam and India.
The incoming Chinese leadership are hawks like Mao Zedong. China will once more have a strong leader at the helm. The entire CCP and PLA have contingency plans for total war. When China unites for total war, nobody stands a chance against us!