First of all, I don't want to receive expensive gifts. The reason is that I am still a student and have no ability to earn money. It is impolite not to return a gift after receiving an expensive gift. It's really beyond my power to return the gift. Don't send more expensive jewelry or something.
I'm not a 20-year-old girl. Don't give those ordinary ornaments. If you want to send this kind of things, you can consider sending her something special, memorable, or creative and refreshing when she travels. However, what I like best is more practical things, such as scarves. Don't think this gift is too ordinary to throw away. I think it's something that only warm and careful boys will give, especially now it's winter, and my girlfriend can think about you all the time around the scarf you gave me. Besides, I like traveling. You can consider taking her to a romantic place she yearns for, when you are sure that you are both free. You can go to Sanya and Yunnan if you can. If conditions do not permit, you can also go to interesting scenic spots near your city, such as Du Shi in Beijing. Plus, you will take good care of her, which will definitely be a beautiful memory, so that she can see your bright spot in this trip and feel that you are more.
Of course, you can also give some common gifts, such as chocolate, roses, plush toys and so on. Then invite her to have dinner with her friends, so that you can get to know each other better and have a lively birthday party for your girlfriend. Sure, you can ask your girlfriend's best friend. I think she will know your girlfriend's preferences very well, and giving her something she likes is the best gift.
Finally, I wish you happiness. She is sure to like the gift you sent so carefully.