[2] Beginning in 2012 the ROCN began upgrading the Ching Chiang class to counter the increasing capabilities of the PRC.

The primary improvements were the fitting of four HF-3 supersonic anti-ship missile launchers [3] and the fitting of the OTO Melara 76 mm naval gun in place of the 40 mm gun on certain vessels.

[2] In 2020 one of the Ching Chiang-class patrol ships outfitted with special electronic warfare equipment was used to interfere with the signals collection of Chinese spy ships during the annual Han Kuang Exercise.

[4] The lead ship of the class, Ching Chiang (PGG-603), was retired on 1 February 2021.

[5] In 2016 Jin Chiang (PGG-610) accidentally launched an HF-3 missile during a dockside drill.