The USA exports around 60% to 65% of the USA's Soy beans to China which is quite a bit of our Soy Beans.
The USA produces and grows around 90% of the worlds Soy Beans so 60% to 65% of Soy Beans being exported to China is quite a bit.
However it seems that the USA will be sending and exporting less of the USA's Soy Beans to China due to Tariffs being put in place by China which is 25%.