In every student's school bag, a fountain pen is an indispensable luggage. Today, although students have ballpoint pens, fountain pens also played an important role in the school baggage of our parents decades ago. Today, fountain pens are still widely used by primary school students. In terms of origin, ink pen originates from Europe, introduced into our country from the beginning of the twentieth century, but it was not until the middle of the twentieth century that it became familiar and popular. In terms of structure, a fountain pen is usually about a hand long. The fountain pen shell can be made from plastic or iron. Each material has its own advantages. Plastic is light but easily deformed. Iron is heavy, but gives the fountain pen a sturdy, shiny, and durable appearance. The fountain pen has a cap, a clip to attach to a shirt or to a book. When open, the fountain pen has an oval nib, pointed at the tip, where the ink flows to write. The fountain pen's core has a much more sophisticated structure than a ballpoint pen, including a rotating part that adjusts the ink level up and down and an ink cartridge. When the ink runs out, students can get their own ink cartridge to refill. When using a ballpoint pen, each student needs to be careful not to let the nib break or break. Ink pens are much more expensive than fountain pens and are heavier, less durable, and easier to get dirty.