I must admit, you invent or design and manufacture something, and the Chinese will improve on it and sell it cheaper!
They do it with all sorts of products.
When I had a Harley Davidson Dealership in Ballarat, I was always amazed at the quality of the Taiwanese parts and accessories I sold. The quality (and fit) was far superior to the original HD factory parts and the Japanese copies.
I asked the salesman how they can produce such excellent products and also cheaper. He said he visits the Taiwanese Factories, and the production line workers totally love their work and take pride in every piece they make!!! They each make thousands of items a day, and have pride in every one of them. It shows!
There is a funny story about Japanese copies though.
During the second world war, the Japanese took a captured soldiers WLA Harley Davidson back to Japan and back engineered it. They wanted a bike that was as good as the Yanks.
The engineering dept, that did the copying somehow got every measurement 25% wrong!!!!!
What they ended up with was a WLA Harley-Davidson that was too big for them to ride