For SRD increase by 10% during GPw, yield increased for winter wheat in Zone II and Zone III of eastern China by 6.5% and 23.1%,respectively; as well as for spring wheat in Zone IV and Zone VI of northwestern China by 4.9% and 6.9%, respectively (Fig. 6). By con-trast, yield decreased for winter wheat in Zone V of western China and Zone VIII of southwestern China by 5.4% and 0.7%, respectively.In addition, yield decreased for winter wheat in Zone I by 12.2%,and for spring wheat in high altitude Zone VII by 7.6%.