The most important thing when giving gifts to elders is not the value of the gift itself. Moreover, your uncle's family is relatively wealthy, and he may not like expensive things you give him. It is better to give him a special gift. The important thing is to make him happy on his birthday. You can give him some handicrafts and the like. I highly recommend dolls made from real photos. They are cute, creative, funny, and very memorable. They will definitely be a special birthday gift for him. In addition, you can also choose some ornaments that can be placed at home or on the desk. Of course, they must be exquisite and unique.
Expensive things may not be very important in the eyes of rich people. They may care more about face, so the gift you give must make him feel proud and make him feel proud.