Although, claiming that this is a Ripoff is like claiming all First Person Shooters are a ripoff of Call of Duty or Battlefield.
How do you not see exact chinesified copies of Ruins and Arena in the screenshots? The castle on the screenshots and in the video is clearly Mahdaar castle from Native.
When you 1 to 1 copy maps from a game, I think ripoff is a justified term. I honestly don't get why they would do that though. It isn't like Warband's maps are particularly great or imaginitive. I imagine making an original generic Ruins or Arena map is easier than trying to copy it. They have no shame in doing straight copies apparently, dunno how that goes with law suits.
Nice graphics though, might ditch Warband and play this instead