I hate to throw some gremlins in your proposed upgrade plans with the Kang-Ding class frigates, but there are some serious issues that are not as well known about the class.
There are serious software integration issues with the class (beyond what was reported in the press), stemming from the hodge-podge of both American, French, and the Taiwanese weapons and electronics onboard the ship. On top of that, you have a mini-hodge-podge with the American stuff, as it is a mix of old American weapons and newer American weapons. There is a certain amount of integration that can be done via the NATO standard, but that is only on a very limited basis. In short, the ship is having trouble talking with the various parts onboard.
Kit also varies between each of the Kang-Ding class frigates, as each ship is unique in terms of electronics; there is no sense of a common electronic system onboard any of these frigates. Whatever the Taiwanese were thinking when they finished installing the electronic systems onboard, I have no clue.
The Taiwanese furthermore are also having an extremely difficult time with getting their Kang-Ding class frigates to work with their American Oliver Hazard Perry class frigates and the rest of their fleet, which is mostly American-made warships, an issue, from my understanding, is yet to be resolved. NATO interoperability standards again can only solve some problems, but again, the various platforms are not well integrated with each other.
To fix all of this, they will pretty much have to do a very extensive overhaul, replacing most of the electronics onboard with a more unified kit. This will be a fairly major overhaul; the ships will be out of service for at least 2 years to do the rebuild, upgrade and refit, and for integration testing to work out the bugs that will invariably crop up. These ships are the odd-balls in the fleet, they don't work right as a platform, and they don't exactly fit in with the rest of the fleet. It is like the Americans trying to integrate a Kirov class cruiser in with a CVBG; its not going to work right completely, even with the top engineers you have to try to get everything to work. Add the fact that the ship your dealing with has a Frankenstein-inspired electronics kit, all I can say to an engineer trying to get this all to work right, good luck, you'll need it.
, better