The Chinese have never recognized the concept of copyright. This is why the US and many other countries refused to supply them with computer chips and other similar technology for many years, as they new full well that it would result in copying, mass production and loss of business/profit to the original owners.
However, many of the restrictions that were applied with regard to exporting technology to China have been lifted or simply eroded into none-existence.
Which is why we can now buy almost any item of an electrical/technological nature, including model tanks, at a much cheaper price than would previously have been possible.

So endeth the lesson in global economics
John