| Date | Duty-paid U.S. Corn Price | Corn Price at Guangdong Port | Margin |
| 2020/9/18 | 2,076 | 2,470 | 394 |
| 2020/9/17 | 2,049 | 2,420 | 371 |
| 2020/9/16 | 2,033 | 2,420 | 387 |
| 2020/9/15 | 2,045 | 2,420 | 375 |
| 2020/9/14 | 2,047 | 2,370 | 323 |
| 2020/9/11 | 2,030 | 2,360 | 330 |
| 2020/9/10 | 2,012 | 2,360 | 348 |
| Unit: CNY/tonne; Price spread: Corn Price at Guangdong Port minus U.S. Corn Price. | |||