This is a traditional Chinese dance costume called "Yangko Green Costume," which is worn by children for classical dance performances.

The design of this costume is inspired by the traditional Chinese opera art, featuring a combination of green and pink colors that give off a fresh and lively vibe.

The costume also features exquisite embroidery patterns, incorporating elements from Chinese traditional culture such as dragons, phoenixes, flowers, and birds.

When wearing this costume, children feel like they are the main characters on stage, able to showcase their dancing talents and allow the audience to experience the charm of Chinese traditional culture.