1. Potatoes: non-GMO potatoes: they are ugly in appearance, generally dark in color, with pitted surfaces and irregular skin color. After peeling, the surface will soon become darker in color and the inside of the skin will be white. Genetically modified potatoes: The surface is smooth, the pits are very shallow, and the color is lighter. After peeling, there is no obvious change in the surface. Testing method: Peel first and then check the changes before deciding whether to eat it or not. 2. Genetically modified corn corn: sweet and crispy, plump, beautiful in shape, similar in size from head to tail. Corn is the oldest, most widely used and most commonly used genetically modified corn. Be careful when buying any corn food. Be careful, even if it’s corn steamed buns sold in supermarkets. 3. The area in China that has obtained legal planting rights for genetically modified rice is Hubei. Be wary of slender and shiny rice. It is easy to be confused with the Northeast "long-grain incense". Be sure to check the country of origin when buying. 4. Genetically modified tomatoes: bright red in color and beautiful, with hard fruits that are not easy to crack. Most of the tomatoes and papayas in supermarkets are genetically modified, so you should definitely not buy them. In terms of safety and quality, fruit products sold by individual farmers are much better than supermarkets. Especially don't be superstitious about foreign-owned supermarkets. The things there are good-looking but not delicious, and there are too many bad and fake ones. 5. Carrots Non-GMO carrots: The surface is uneven and generally not straight, from thick to thin from head to tail. And the head protrudes outward. Genetically modified carrots: The surface is relatively smooth, usually straight, and its tail is sometimes thicker than the middle. And the head is concave inwards. Note: Carrots are only available in autumn and winter, and those in summer are generally genetically modified. 6. Soybeans, non-GMO soybeans: oval shape, a bit flat. The navel is light brown. Beans come in different sizes. The soy milk that comes out is milky white