Judging from your picture, this insect is called mole. Gryllotalpa is a plant pest, which is harmless to people. Adult mole crickets are generally about 30 mm long. The body is light brown, and there is an obvious dark red long heart shape in the center of the chest back plate. Spots. The front wing is short, the rear wing is long, and the ventral end is nearly spindle-shaped. The forefoot is dug, the inner and outer edges of leg joints are straight, and the notch is not obvious. What is the inner edge of the hind foot? There are three or four thorns.

White grub is one of the main pests of crops, which harms the roots of crops.