Chinese are playing smart and using this old Soviet hulk to learn the operating dynamics of a carrier. These guys have to start from scratch and smartest thing they did was to buy this old carrier. It does not matter who copies who. What matters is to flatten the learning curve and put out a credible carrier/ aircraft/jet engine within the next 10 years. US missile technology or even NASA putting man on moon was based on WW2 Nazi research. After WW2, half of the german engineers went to USSR and the other went to US. So in effect, US was copying German design.
What Chinese have on their side is their huge economy/GDP, industrial complex, $$$ and determination and engineers. I look around and I do not see lack of smart Chinese engineers. So now they copy then they make improvements and in the future come out with their own technology.
Many so call sino-experts from the west still have not figured out what was the real reasons for the rise of China? They tend to relate this based on previous great powers Japan, German, USSR and USA path to glory, that were military and politics! They are all WRONG!
Rise of China was solely based on economy development initially driven by overseas diaspora; military and politics were their very last.