Don't think of this game as a Chinese GTA, it is more of an open world 3D fighting game. There are guns in the game, but they are sparingly used. There are vehicles, but there are more of a point A to point B method of travel. The meat of the game is the fighting mechanics. Learn the combos and practice the timing, this is where most of your time will be spent.
The game is really boring. Level design is all over the place and makes no sense. Seems like all of the effort went into adding unnecessary NPCs and terrible dialog for Sam. Developers probably thought that the success of the prior games will carry this game forward.