The Daya board logo is printed on the board. The real Daya board will have concave and convex anti-counterfeiting marks on the surface of the board. You can feel it by touching it with your hands. You can also see it by tilting the board towards the light. to anti-counterfeiting marks. First, check whether it is a formal authorized merchant of Daya sheets and whether there is an authorized certificate. Then there should be Daya's logo on the board.