As shown in Figure 4, the immunohistochemical staining results of VEGF in mouse tumor tissue showed that the color of group M was black brown, and the proportion of positive cells was 29%-35%; the color corresponding to group W was mainly brown with light yellow, and the proportion of positive cells was 17%-25%; the color corresponding to group C was mainly brown with a small amount of brown, and the proportion of positive cells was 21%-29%; and the color of group C+W was light yellow, and the proportion of positive cells was 7%-15%. Here, VEGFA is linked to neoplasm.