就目前的材料看，尚难以断定夏代已有麦类作物种植，商代“麦”、“来”也未必 为冬小麦，春秋、战国时期冬小麦已在北方地区普遍种植的说法也难以经得起认真推敲。 As far as the current materials are concerned, it is still difficult to conclude that the cultivation of wheat crops in the Xia Dynasty had already been carried out. The “wheat” and “coming” in the Shang Dynasty are not necessarily winter wheat. The saying that winter wheat has been commonly planted in northern China during the Spring and Autumn Period and the Warring States period is also hard to stand up to Scrutiny.