I think as China's interests grow in foreign places, that they will use their assets to secure and protect those interests. Not to intrude upon other's responsibilities, but to take up the "cause" from the territorial limit on.Except China's SLOC strategy, outside ECS and SCS, has been to work with local and regional nations on maritime security, and only using Chinese assets when local governments can't handle specific problems. Do you think China will change that policy?
The U.S. Coast Guard is doing a LOT of drug interdiction to help protect US interests...some nations work closely with them, in other places the US Coast Guard is interdicting them on the high seas. Same type of thing with piracy as well in some places. Off Somalia the international community is involved and their navies are doing the missions. In other places, the Coast Guard also fills that role.
I believe China will gravitate to doing the same things, from the South China Sea to other critical areas that impact their interests.