The technology is in place for a Sino-Kirov battlecruiser too, that does not mean it would be a sensible allocation of China's finite resources. Indeed, looking at the rapidly deteriorating security environment I'm not sure aircraft carriers should be a high priority for China at all given the enormous investment that would be required to realise an effective capability. But if China is going to invest heavily in carriers then conventional carriers offer superior force generation prospects. Take the billion dollars saved per conventional carrier and send it to the more important SSN/SSGN programs. To put it simply, nuclear carriers are a luxury that China can no longer afford.