"Why the hell would the United States or Canada need to import any grain product from China?"
It's called "Free Trade" for the step-by-step dismantling of the United States economy. It is deliberate on both sides of the Pacific.
Welcome to the new 21st century global economy!!! AND CHEAP LABOR! Seems rather ironic to me that such a 'modern' economy is supplied with 18th century uneducated, 3rd world laborers.