The blue costume is a type of traditional Beijing opera, known as "qingyi".
It is worn by female characters and is typically made from fabric with alternating white and blue stripes.
The design of the costume is intricate, featuring embroidered floral patterns such as peonies and chrysanthemums.
These floral patterns symbolize good fortune and auspiciousness in Chinese culture.
By wearing this qingyi, actors can better embody their characters and provide audiences with a visually pleasing experience.