What kind of bug is this? There are many trees this year.

Distributed in Hebei, Shanxi, Shandong, Shaanxi, Henan, Qinghai, Inner Mongolia, Zhejiang, Jiangsu, Shanghai, Fujian, Hubei, Guizhou, Yunnan, Chongqing, Sichuan, Tibet and other places. Harm begonia, cherry blossoms, figs, crape myrtle, rose, red maple, citrus and other flowers and trees. Nymphs and female adults often gather in piles on bud axils, tender shoots, leaves and branches to suck juice, resulting in poor plant growth and early defoliation.