Zhongzheng 176 maize belongs to semi-compact mid-late maturity maize hybrid, which is suitable for planting in northern China. It has the characteristics of high and stable yield and strong lodging resistance. In addition, Zhongzheng 176 maize is resistant to many diseases. Demeiya 1 is an extremely early-maturing maize variety, which is suitable for planting in the northern extremely early-maturing maize area. It has the characteristics of early maturity, high yield and high quality. In addition, Demeya 1 has strong drought resistance and is suitable for planting in arid areas. To sum up, Demeya 1 matured early.