I can give some solutions, but remember it's just my personal opinion. I could be right or wrong.
China will clear the first island chain with missile and air strikes. Ships are not needed at all because the distances are not that great. The J-16, J-20, H-6K, H-20, UCAVs, DF-21D, and CJ-10 can destroy all military bases, aircraft, and ships within the first island chain. Think of it as a 'Pearl Harbor' style attack. It's going to be a preemptive strike at a time of our choosing. They won't know what hit them. Japan will be bombed back into the Stone Age.
Next, the PLA will launch a full-scale ground invasion of Southeast Asia.
We will annex Burma, Thailand, and Peninsular Malaysia -- instantly giving us a massive coastline on the Indian Ocean and full control of the Strait of Malacca itself.
Once we have unimpeded access to the Pacific and Indian Oceans and control of the Strait of Malacca, a full-scale naval buildup will make perfect sense. China already has the world's largest shipbuilding industry.
Central Asia has plenty of oil and natural gas. I personally think it will be easy pickings for the PLA as long as Russia remains neutral. Central Asia itself is a separate issue and irrelevant with regard to the navy. I'm just saying the PLA can easily take it, that's all.
Burma would be easy to take. But at the meantime, China should continue modernizing her navy. It will put them in a better shape. What's stopping China from doing so?