I am expecting the Chinese government is going to enact some very Keynesian measures. Two of the ways to approach this is build infrastructure for the sake of building infrastructure. Japanese government often does this, but in the end, excess infrastructure is a waste of money. China is nearly overbuilt.
Of course, they can build more and better schools that would always help.
Another way is to build alternative energy infrastructure. Obama is planning to turn the US into an alternative energy economy. For the sake of its own future, China should not be fossil and imported fuel dependent.
I expect military building to increase, like in ships, planes and tanks. Defense industry spending is another Keynesian form of spending. So you're right, i would expect they would pick up the speed in building ships.
Indeed excess infrastructure like building bridge to nowhere is a waste of money, but I kinda disagree with you about China is overbuilt. I think it depends on what sector. For example, I read somewhere that China's railway has become a bottle neck for the economy. Even in housing sector with the dwindling prices, many Chinese still don't have their own home. So there are plenty to build and fill. I really hope the navy will pick up the demand for ships, especially in this uncertain time. I'm afraid with all those shifting in power today, the potential for conflict is pretty high.