I personally think that pennants 100 to 119 will be assigned and reserved for 055s and its variants, and that will be its grand lifetime total. All the older destroyers within those pennants will be retired and replaced, and the 052Ds (117, 118, and 119) will eventually be reassigned a new number and moved to another destroyer division. The 055s will be on two entirely different destroyer divisions from the 052D, one of which will be the reformed 1st. As for the 052D, remaining blank pennants on the existing destroyer divisions (2nd, 3rd, 6th, 9th, and 10th) will be filled, such as 135 on the 3rd and 166 on the 2nd. Pennants like 130 and 160 will be filled, and pennants used by older and refitted destroyers such as 167, 168, 169, 136 to 139, will be replaced by 052X in due course and in the long term.
The next four Type 055 in the short term will be 109, 110, 111 and 112, if current numbering follows, meaning the first 052 will be retired by then. The second new four will be 113, 114, 115 and 116, which will see retirement of the second 052 no. 113 and the two 051D, 115 and 116. The third quartet will still be decided upon, but if they did, they will occupy the next pennants 117, 118, 119 and wrap back to 100. This will mean that the 052D using 117, 118 and 119 will be given new numbers and transferred, likely to the 10th, and can end up being 127, 128 and 129. But that's speculative on my part of course.
