The fruit coloring of Red Fuji apple began earlier than Guoguang apple and it was slow. Coloring usually begins in late August and after mid-September, its coloration is not as fast as Guo Guang. To improve the coloration degree of Red Fuji, the following measures can be implemented in the mid-September in addition to a series of work such as pruning and timely controlling pests and diseases. 1. Nitrogen control. After no longer applying topdressing nitrogen fertilizers after September, scientific water supply methods using frequency and shallow irrigation should be adopted to maintain relatively stable soil and temperature. 2, pick leaves. Remove 1-2 old leaves that are hidden above the apple to increase the utilization of direct light. 3, spraying. 500 ppm rare earth was sprayed on the canopy, the total rate of red fruit was increased by 12%, anthocyanin was increased by 1-3 times, the fruit weight increased by 6%, and the yield increased by 15%. In addition, Wangshu spray ethephon below 1000ppm or 5000ppm potassium dihydrogen phosphate also have a significant effect of color. 4, filming. The mulching film between the rows and strains of the tree can increase the intensity of the reflected light, significantly increase the coloration of the top of the fruit and the pod, and increase the sugar content by 1-2 degrees. 5, escorting roots. During the coloring of Red Fuji apples, the practice of diligently cutting the tree roots to destroy shallow roots should be avoided, which is beneficial to the synthesis of cytokinins and increase the sugar content of the fruits. 6, late receipt. The sooner or later harvest will have a greater impact on the coloring and quality of apples. The harvest was too early and the apples were poorly colored and of poor quality. Apples generally harvest 175-180 days after harvest. The closer to the late stage, the greater the temperature difference between day and night, the more favorable the fruit coloring. Therefore, it is advisable to harvest Fuji later. China Agricultural Network Editor