I have the exact same saw. The blade is made in China. I checked the runout on it and it's similar to Tenryu, Freud, Dewalt (UK-made), which I also use. It cuts very well. I put it on my dedicated trim saw (non-sliding) and cut some 5" wide joints in 8/4 walnut this week. It cut straight and true, monitoring feed speed.

On your saw, does it make a straight cut through the sliding motion? Mine cuts an arc, concave to the left side of the cut. Also the fence on mine is not flat, so I get a different cut whether I cut off the left hand side or right hand side.