A fountain pen is a writing tool that combines writing and collecting value. It uses a metal pen tip combined with an ink bag/absorber to supply ink, resulting in smooth writing with varying thickness and unique texture. According to the material of the pen tip, it can be divided into steel tip and gold tip, and according to the ink supply method, it can be divided into ink suction type and ink bag type. Suitable for daily writing, office signature, calligraphy creation and other scenarios, some high-end models have become collectibles due to their excellent craftsmanship and are classic and practical writing instruments.