2. According to the Internet, shrimp belongs to seafood and contains pentavalent arsenic compounds, which will react with vitamin C in durian to generate trivalent arsenic (namely "arsenic"), which is highly toxic. Suppose this reaction is true, but after calculation, you need to eat hundreds of kilograms of crayfish and dozens of kilograms of durian at the same time, and the "arsenic" produced by the two reactions is enough to cause poisoning symptoms. Most people can't eat this amount.