Except 119 and 120 are already taken up by NSF Type 052D destroyers, Guiyang and Chengdu, and these pennants may already have been reserved prior to 101.055 does not follow the same rule, like the 055 for North fleet starts from 101. If you are right, the first 055 should have a pennant number 119 or 120. The 055s for South Fleet may start from 181, or just continue after the North fleet, having 105 106 107 108.
Does not make sense because you are limiting large destroyers to only 10.176, 177, 178 and 179 will be reserved for 052-series of 9th division.
As far as I understanding, the destroyer of PLAN is classified two level, 1 large destroyer, the commander is vice division or brigade level. 2 destroyer, the commander is regiment level.
For the pennant numbers of regiment level destroyers
131-139 belong to 3rd division
150-159 6rd division
161-169 2rd division
170-179 9rd division
119-129 10rd division
101-??? are for the large destroyers
What is clear is that the pennants wrap around after they reach --9, they go back to --1.
After pennant 139, which is Ningbo, a Sovremenny with the 3rd, the next pennant would be 131, which is given the Type 052D destroyer Taiyuan for the 3rd.
After pennant 169, which is Wuhan, a Type 052D with the 2nd, the next pennant would be 161, which ended up being Type 052D destroyer Hohhot.
So who does 101 Nanchang belong to? Its based in Qingdao, which is the home base of the 1st Destroyer Division. You forgot to include its numbers.
Then they get its first 052D destroyer, which is 117 Xining, followed by 118 Urumqi which is 052D. I'm still not completely certain if 119 Guiyang is 1st or 10th. If 117 and 118 are already reserved for 052D, it would wrap around back to 01.
Look at the history of all previous ships of the 1st Destroyer Division.
Anshan class, previous Gnevny class
111 is missing, but after that you get to the 052 era with 112 and 113, 114 is missing then you get to the 051C era with 115 and 116.
They were in the 3rd DD ESF. For some reason 135 is skipped, and 136 to 139 are given to the Sovremenny that went to this unit.
They were in the 2nd DD SSF. 167 Shenzhen (051B), 168 Guangzhou (052B) and 169 Wuhan (052B) came next after this.
Once the Ludas were retired, the pennants and names are free to be reused again.