The person appears to be a/an East Asian Female, approximately 20 to 29 years old.
For an East Asian female attending a formal evening event, a chic option could be a floor-length A-line gown in a rich jewel tone, featuring intricate lace details and a flattering off-the-shoulder neckline. This can be complemented with statement chandelier earrings, elegant strappy heels, and a sleek low bun hairstyle for a polished look.
An appropriate formal evening outfit for an East Asian female could include a floor-length cheongsam with intricate embroidery, complemented by elegant teardrop earrings, stylish closed-toe heels, and a refined updo hairstyle. This ensemble not only highlights cultural elegance but also adheres to formal dress codes.