A gene that can express special traits is introduced into ordinary crops, so that ordinary crops have some special excellent traits, such as drought resistance, salt and alkali resistance, insect resistance and disease resistance … The source of this gene can be any organism. This kind of food crop is called genetically modified food crop.

Genetically modified food has become quite common all over the world, with the largest number in the United States. Many grains in China are also genetically modified grains.

At present, it has not been found that genetically modified food does harm to human health. However, due to the restrictions on trade in genetically modified food in some countries as diplomatic means and media hype, many people think that there are hidden dangers in the impact of genetically modified food on human health, although there is no conclusive evidence.