1, Vietnamese rosewood, rosewood and Huang Huali: These are all high-grade wood used for abacus, which are hard and durable, with beautiful color and texture, making abacus not only a practical calculation tool, but also a certain collection value.
2, dates: ordinary abacus will use dates, because it is also hard and durable.
3. Chestnut wood: The abacus frame is generally made of chestnut wood, while the beads are made of camphor wood or cypress wood.
4. Ebony and dark wood: These two kinds of wood are dark in color and tough in texture. They are often used to make abacus beads and belong to precious wood. The abacus beads made are naturally valuable.
5. Huang Huali Wood: Some old abacus beads are made of Huang Huali wood. This kind of wooden abacus beads is relatively heavy, and it is not easy to slip off when using, so it is a relatively high-end choice.
6. The abacus is an ancient computing tool, which originated in ancient China and is known as "the oldest computer in the world". It consists of a string of beads with the same number arranged in a rectangular frame, and the fingers are used to fiddle with the beads to perform basic operations such as addition, subtraction, multiplication and division. The invention and use of abacus greatly improved the calculation efficiency of ancient people, and had a far-reaching impact on the economic development and social progress of China and even the world.