What's the difference between corn and corn?

"Baosu" means corn, which is a written language, and "Baosu" is a local dialect. China's modern and contemporary history data series "Taiping Tian Kun Formulated Almanac": "Long summer four: the northern soil grows millet." Wei Qilin's "Hundred Birds Clothing": "The millet planted by Guka is half as high as others." According to Mr. Tong Pingya's Search for Corn Names, "After corn was planted in various parts of China, the working people gave it many different names, or its source was called Yumai, Bai Weiling, Fanmai, Xifanmai and Hui Hui Barley; Or because of its shape, it is called Guobao, Baogu, Baosu, Bangzi, Yu Ding and Baomir; Or its quality, called pearl fruit, pearl rice, corn, Yumai, five grains, jade beans, and so on. Corn has been introduced to China for nearly 500 years, and there are more synonyms in literature and local records than any other crops. When I consulted the ancient local chronicles and compiled this book, I came into contact with as many as 124 corn synonyms, but some of them could not be fully verified due to lack of evidence. " Tong Wen listed 50 synonyms of corn.