Almost everything they make is a copy (ripoff) of something a US manufacturer designed and made. I don't support companies like that, because it hurts the companies that put in all the R&D work to bring the original part to the market. How would you feel if you put a lot of time and money into making a product, just to have someone copy it in China and sell it as your competition for less money? This video just got posted a couple days ago about a valve body design they stole.

https://youtu.be/9dsHrSq8pso?si=pxSuU8HzrP1Utabs