When choosing a gift for your girlfriend's birthday, you should consider her interests, preferences and personality. Here are some suggestions:

Jewelry: If she likes this kind of thing, it is a good choice to give her a beautiful jewelry. You can choose a necklace, bracelet or earrings, or a ring to express your love for her.

Skin care products or perfume: giving her a set of high-quality skin care products or perfume can help her keep her young and beautiful face.

Fashion accessories: Give her some fashionable accessories, such as sunglasses, scarves and hats, which can make her more fashionable and confident in her daily life.

Books or movies: If she likes reading books or watching movies, give her a book or movie ticket that she wants to see, so that she can have a special experience on her birthday.

Food: If she is a food lover, give her some special food, such as chocolate, biscuits and special snacks. So that she can enjoy the fun of food on her birthday.