第一，取消进口数量限制，实行关税本额制度。这对主要粮食品种如小麦、玉米、稻谷、油脂实行关税配额制度；第二，取消任何形式的出口补贴，对中国的粮食外贸出口无疑也是一大挑战；第三，最惠国待遇的普遍认同原则。根据世贸组织关于最惠国待遇的规定，同任何一个成员国达成 First, to cancel the limit on the number of imports, the system of customs duties. This imposes a tariff quota system on the major grain varieties such as wheat, corn, rice and oil. Second, the removal of any form of export subsidies is undoubtedly a challenge to China’s food exports. Third, the principle of universally agreed upon the most-favored nation treatment. In accordance with the WTO rules on the most-favored nation treatment, it is agreed with any member country