To people thinking of trying Lepin:
Lepin sets' bags are not sorted like Lego, so if you buy a large set, you are basically playing jigsaw puzzle.
Lepin sets have also been known to use the slightly wrong parts sometimes, so things would not fit together as well.
There's also a pretty good missing parts rate in the large sets (Lego is near 100%), so prepare to not be able to finish a set due to it.
All these issues, you can just look up youtube reviews of Lepin sets. The buyers all had them.
You really get what you pay for.
Now, Lepin also makes sets not based off of Lego official designs, but other people's designs posted on websites.
Of course they don't get any royalty nor acknowledgement.
How would you feel if a company took your design and made a product without your consent.