There is a "Cao Lu Hi-Tech Machinery Manufacturing Co., Ltd." in Caoxian County, Shandong Province. They are regular manufacturers. You can visit the company on the spot. Their company covers an area of 160 mu, and is the largest and most formal corn miscellaneous grain processor in China!

If you search for "Cao Lu High-tech Corn Processing" video in Baidu, you can see their live processing video at the National Agricultural Machinery Conference!