No. Qiu Jin Sugar Orange has normal new leaves and evergreen leaves. After extensive fertilization, the leaves are dark green, light green and tender, ovoid or ovoid, with short tip, wide wedge-shaped leaf base and not yellow. The occurrence of this yellowing is generally related to the lack of nutrients in soil and trees, especially the lack of a large number of elements, and the lack of fertilization in winter. It is suggested that some compound fertilizers and medium and trace element fertilizers must be buried when fertilizing in winter, and trees with these symptoms should be sprayed with corresponding nutrients in time. Citrus yellowing is also related to poor root system. In this case, it is more urgent to improve the root system. It is suggested that spraying sea elf roots to repair roots and supplement essential nutrients.