Foreigners generally like some Chinese style things.
I recommend you to give him some Chinese brushes, silk and other things, or some Peking Opera masks, Chinese knots and so on. They are all good choices. If you think these are too ordinary, you can give him an agate bracelet. In Chinese tradition, agate is a very good jade, which is not only good for the body, but also has the meaning of "good luck and good fortune". Of course, an agate bracelet alone cannot reflect the characteristics of China. I suggest you can customize one online, engrave the other person's Chinese name or some auspicious words in Chinese on it, and he will definitely like it.
You can also give a real doll. This can also be ordered online. I suggest you choose a Tang suit version when ordering, which is more Chinese. And this is also convenient to carry.