My comment:
(a) Skip the first two paragraphs, which is familiar to us.
(b) "Tuo Jiang-class catamaran corvettes, the PGG 618" (the new ship) vs.
"in honor of the PC 1247 Tuo Jiang patrol vessel that fought in the 1958 Taiwan Strait Crisis"
(i) in US:
hull classification symbol
en.wikipedia.org/wiki/Hull_classification_symbol
(section 3.1.2 Surface combatant type: "PG: Patrol Gunboat (retired)"/ section 3.1.4 Patrol combatant type: "PC: Coastal Patrol, originally Sub Chaser")
(ii) PGG seems to be Taiwan's classification.
Republic of China Navy
en.wikipedia.org/wiki/Republic_of_China_Navy
(On December 28, 2011, the 2 Lung Jiang (PSMM Mk5) Missile Guided Patrol boats (PGG 601 and 602) in the 131st Fleet retired from ROC Navy service, after entering service in 1978 and 1981)