Select corn varieties to follow the following principles: 1. As the main cultivar, it must be approved and promoted by the local agricultural extension department for testing and demonstration. 2, maturity mature. In general, normal physiological maturation or target trait requirements are required for more than 5 days before frost. 3, with high yield performance. This is the main purpose of our corn planting and requires a good yield. Even for special corn production with different quality requirements, the prerequisites are based on high yield. 4, with stable production. During the inter-annual output fluctuations are not significant. It not only reflects the high yield performance of the variety, but also reflects its adaptability to local natural conditions and its resistance to local natural disasters and major pests and diseases. 5, with high quality. It mainly depends on the grower's purpose. Order farming is based on order requirements. For the purpose of seeding, the emphasis is on commodity quality requirements such as bulk density and color. The industrially processed starch is mainly processed with high starch content and processed cornmeal, fresh green corn ear or quick-frozen, and its marketability will consider its edible quality. 6, the varieties have disease resistance, strong resistance. Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshihealths.com