If you want my opinion, emphasis my opinion, not meant to be taken as authority, my guess is 9 or 12 ships in an initial batch run. 9 if you have three ships per fleet, a set of three for the North Sea, another set for East Sea, and third set for South China Seas. 12 if you have 4 ships per each of the three fleets. With the carriers, I am assuming one per fleet for now, CV16 for the North Sea, CV17 for the East Sea, and CV18 for the South China seas.
12 055 for an initial batch, but these numbers can be cut if 055A starts appearing, taking over the balance of the 055 original contracted numbers.
12 055 for an initial batch, but these numbers can be cut if 055A starts appearing, taking over the balance of the 055 original contracted numbers.