Ming Dynasty period.

According to provincial and county records, corn was first introduced to my country in Guangxi in 1531, less than forty years after Columbus discovered America. By the end of the Ming Dynasty (until 1643), it had spread to ten provinces including Hebei, Shandong, Henan, Shaanxi, Gansu, Jiangsu, Anhui, Guangdong, Guangxi, and Yunnan. There are also two provinces, Zhejiang and Fujian. Although there is no record in the local chronicles of the Ming Dynasty, there are other documents proving that corn was cultivated in the Ming Dynasty. From the first fifty years of the Qing Dynasty to the end of the seventeenth century (the thirty-ninth year of Kangxi), the local chronicles recorded more corn in six provinces: Liaoning, Shanxi, Jiangxi, Hunan, Hubei, and Sichuan than in the Ming Dynasty. After 1701, there were more local chronicles recording corn, and by 1718, two more provinces, Taiwan and Guizhou, were added. According to records alone, in less than two hundred years from 1531 to 1718, corn had spread to twenty provinces in our country.