The Taiwanese have developed an over-the-horizon anti-ship missile for their 2 remaining seaworthy subs.
That's nice, and all, but without new subs to put them on, what's the point? Those two aging subs will have to be retired one day fairly soon, I imagine.
They'd be better off using American Harpoon missiles just to give us cover to use our subs to fire them before we officially intervene in case China tries to invade Taiwan.