The so-called genetically modified food is to transfer one or more foreign genes into a specific organism through genetic engineering technology, and make it effectively express the corresponding products (polypeptide or protein). This process is called transgene. The food produced by genetically modified organisms is genetically modified food.

According to the different sources of genetically modified food, it can be divided into plant genetically modified food, animal genetically modified food and microbial genetically modified food.

1996, China successively approved the transgenic storage-resistant tomato "Fan Hua L", transgenic tomato "8805R" and sweet pepper "Shuangfeng R" to enter industrial production. Transgenic vegetables include tomato, eggplant, pepper, potato, cucumber, pumpkin, watermelon, melon, zucchini, carrot, cabbage, cauliflower, Chinese cabbage, lettuce, spinach, fennel, pea, asparagus, mustard, onion, Chinese cabbage and so on. The improved characters include disease resistance, insect resistance, herbicide resistance, stress resistance, quality improvement, bioengineering and so on. Transgenic plants are going deep into human life with an irresistible trend.

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