Girls attach great importance to their 20th birthday, so you must give her a profound gift. If you are not in a relationship yet, you can give her something like watches, flowers, perfume, chocolate, but it must be original. If you are lovers, the range of gifts is relatively wide, such as bamboo slips love letters, personalized imperial edicts, write your blessings and vows to her. Or lifelike pottery dolls, must be two people. This will make her think of you, you can also make a puzzle with your photos, which is fun. If you are good at making, you might as well make a gift yourself that you think is worth giving. She will definitely cherish it. For girls, no gift is worse than one made with your heart.