Of course it's ridicules, but I'm not making such an argument, now am I? The Chinese just don't want to spend dozens of more years researching the necessary steps to create high quality and high performance engines, and taking a look at the engines will help China to decrease the time it needs to do just that. They're not looking to copy, but to implement what they learn from the Russian engines into their own domestic ones.
You learn pretty much zero by importing engines for study.
India is far behind China and has around a decade head start as it imported them in the 1980s and China had to wait till the 1990s.