Today's building materials market is full of all kinds of fakes. As the leader of water paint industry, Chenyang water paint still has strict anti-counterfeiting inquiry measures, which can effectively avoid the damage of counterfeit and shoddy goods to consumer interests. The anti-counterfeiting code inquiry method of Chenyang water paint products is a two-dimensional layer on the outer packaging of barrels. If the information displayed after scanning the code is "This inquiry is the first inquiry", the products are genuine. If