The method is as follows:

1. Preparation tools include an ink pen, a small carving knife or a sharp needle.

2. Choose a suitable location for engraving on the ink pen, either on the pen body or on the pen cap.

3. Use a cotton ball or clean cloth to wipe the pen body so that there is no dust or stains on the surface, so that the engraving effect will be better.

4. Use a carving knife or a sharp needle to gently carve the letters or names to be engraved on the pen body.