We need to pay the money to USA as tribute so its a write-off anyway, but I have low confidence we will ever see working hardware from it. However I bet China would actually prioritise delivery of some new subs if we pivoted to using them as our naval supplier, to win mindshare in the west as an alternative to America or Russia as an arms supplier. and we set up the next 100 years of paying off bigger countries to leave us alone, which honestly worked well enough the last 100 years