General jewelry stores have this business. You can carve it when you buy it back. Chinese, English and numbers are all acceptable, and they should be free. However, considering that the ring is not big enough to carve many characters, it is better to control it within eight Chinese characters:)

As I am a student, the meaning of the ring is mainly to motivate myself, so I suggest that the landlord can wear it on his right hand or hang the ring around his neck with a chain. Because rings, especially those made of platinum, are worn by boys, and their appearance is simple and generous, the flower rings of those girls are not suitable, but it is interesting to wear a more formal plain ring on your left hand. The left index finger indicates unmarried courtship, the left middle finger indicates that someone has fallen in love, the left ring finger indicates marriage, and the left little finger indicates single. And wearing a ring on your right hand doesn't mean anything.