CV-16 home port is at 35°43'02.3"N 120°00'21.9"E. It is within East Sea Fleet.
One common faulty IMHO assumption is that the Chinese CVs are meant for taking and keeping Taiwan or islands in SCS. In my opinion, these targets do not deserve or qualify a CV for they are too close to mainland. PLAN CVs are meant for protecting Chinese marine time lanes further away where land based aircraft can not reach. So I am saying areas near Malacca straight and beyond that means indian ocean, Pacific beyond first island chain.
Also, I believe everyone must drop or begin to drop the connection between "sea" part of fleet name and their mission. These fleets are extending their coverage beyond the seas to the oceans. They would be more accurately named by their mission as East Fleet, South Fleet and North Fleet. Although PLAN may choose to keep the name unchanged for whatever reasons, it would be misguiding if we keep the "sea" in our mind.
So at the present, I agree with you that two CVs sharing the same home port. But that is not because any of the fleets have a specific reason to have the CVs more than others. It is only because of logistical reasons. In the long run, I believe both East and South Fleets will have CVs. North fleet may or may not need CV depending on the situation on the Korean peninsular as China need a strong air defense for Beijing while US airbase in SK is too close a threat, today it is like the door is open.
OK, let's see, wich PLAN Fleet is closest to Strait of Malacca and Indian Ocean ( aka Chinese energetic lifeline )? Wich Fleet has only semi-free exit towards open Pacific ( not blocked by Japan, S. Korea and Taiwan )? Wich Fleet has highest probability to use carrier in real combat operations?
IMO, that's South Sea Fleet.
And having carrier based in Qingdao is, IMHO unnecesarry, because carriers from Sanya can quickly sail into a Yellow Sea if necesarry ( 1 or 2 days of sailing ) and it's much closer to it's presumed main area of operations ( SCS, Strait of Malacca and Indian ocean ).
Also, areas in Yellow sea and ECS are too small for efficient use of carrier. Any eventual conflict in that area ( like Senkaku's ) is easily handled with ground-based aviation ( 350 km from Chinese mainland ), while Spratley's are about 1000+ km from Hainan ( so there's need for carrier there ). Same thing for any conflict about Taiwan.
Any use of aircraft carrier as defence against US aircraft in S. Korea IMHO isn't serious idea, so please let's return to serious discussion.