The routine of aquaculture contract fraud, publishing false advertisements is attractive. This kind of breeding advertisement usually claims that seedlings are provided free of charge, products are recycled with guaranteed bottom, and small investment and big return. The seedlings or seedlings provided by fraudulent companies to farmers are animals and plants with extremely low survival rate bought back from other places at low prices, but in the company's advertisements, they have become new varieties with easy reproduction and high survival rate, and have been dubbed with various names. In the early stage of publicity, the company put advertisements on David and websites for publicity.