Christmas is actually a foreign holiday, but many people who work in foreign companies will also be influenced by these foreigners, so they have the habit of celebrating Christmas. Of course, you must give your girlfriend's parents who have such a habit your own gifts, not only to lay a good foundation for the future, but also out of a kind of courtesy to the elders, so choosing a Christmas gift is important, I can give you some small suggestions:
1. Although it is Christmas, it is still Chinese, so if you give gifts, you can give some gifts that Chinese people like. The elders like solemn gifts, and giving a vase as a home decoration is not bad.
2. Of course, if her parents will invite you to celebrate Christmas together, it is also very good. You can bring a bottle of red wine and a bouquet of flowers, which is a very Western gift.
3. You can ask your girlfriend what gifts her parents like, and then give them what they like. I believe it will be good, and I believe her parents will like it very much.