What is this green bug?

This is a Chrysopa, also called Chrysopa. Its larvae are called aphids and lice. Chrysopa is a carnivorous insect. Chrysopa is a big family of Insecta Neuroptera, which is distributed in most parts of China. Chrysopa is an important natural enemy insect of pine aphid, willow aphid, peach aphid, pear aphid and pine scale insect, which effectively inhibits the population growth and decline of aphid scale insect in forest nursery and orchard.