The first Triona II OPV CSS Admiral Woulan has entered service with the HCS Navy. This is the first of 6 enlarged patrol boats which will supplement the 16 Trionas already in service. The main difference with the new boat is it is bigger. It weights 2500t compared to the older boat's 2000t.
It's weapon fit is much the same as the older boat though the larger size means the ships is less cramped (a major criticism of the Triona is there is too much squeezed into a fairly small hull) and has improved seakeeping abilities. Wheras the older Trionas are used mainly for coastal operations the Triona IIs are likely to be supplementing larger ships in more blue water operations.