First of all, look at their personality, and then let your girlfriend know what is missing at home and what to make up; Like workers and peasants, most of them are practical, so they should be practical and not extravagant; Of course, it is also possible that they are more face-saving (after all, it is not easy to raise a girl), so it is also possible to buy a higher-end one.
But don't worry, you really don't know what to buy. Just buy a good set of cosmetics, two bottles of Wuliangye and two people from China with some supplements and fruits. They'll love it. I paid a high price for it. Who doesn't like it? But this is the worst policy; You'd better discuss it with your girlfriend.