It's a culture thing. Chinese people don't look down at copying like we do in the west and they don't value originality as much as we do.
There has been several times where I have played a new game and predicted correctly that it was from a chinese dev.
One recent example is Gunfire Reborn. I like this game but it is literally a combination of BL2, Risk of Rain and Rogue legacy. The mechanics are blatant copies to the point where they even copied some aspects that just dont work very well in their implementation.