Unfortunately jobjed a hit from a million dollar sea skimmer or two would stand to take out that billion Yuan 071 together with it priceless cargo of human beings and is not worth stinging on. Besides the moral of the men onboard I am sure with be alot higher knowing they are protected by the best that is available to China.
The money saved by using H/PJ-13s instead of H/PJ-12s allowed China to build additional Type 22 FACs and assisted with purchasing Sovremmenys during tense times with Taiwan separatists.
The next best alternative that could be afforded by the opportunity costs of purchasing H/PJ-12s was actually the better option; so the PLAN opted for that instead.