Analogy is a commonly used thinking method in our daily life, and new ideas can also be found in analogies. For example, after Lu Ban cut his finger on a weed leaf, he discovered that there were sharp teeth on both sides of the leaf. He had an idea and made an iron tool with many fine teeth on one side and invented the saw. The fine teeth of the leaves cut the skin and flesh, which is an analogy to the saw cutting the wood.

As an employee of a toothbrush company, Kato's dissatisfaction grew as his gums bled after brushing his teeth several times. He walked toward the company angrily, preparing to complain to the relevant technical department.

When he walked into the company door, his pace gradually slowed down as he walked. Kato Shinzo once participated in a management science class organized by the company. There is a famous saying in management science that made him change his attitude. This admonition said: "When you encounter dissatisfaction, you must realize that there are endless new worlds waiting to be developed!"

After he calmed down, he and his colleagues came up with a lot of ideas. A great solution to bleeding gums. They proposed various improvement plans such as changing the texture of the bristles, modifying the shape of the toothbrush, and redesigning the arrangement of the bristles. After demonstration, they conducted experiments one by one. During the experiment, Kato discovered a detail that ordinary people overlooked. He saw under a magnifying glass that the tops of the toothbrush bristles were cut at sharp right angles due to machine cutting. "If all these right angles are rounded in one process, then the problem will be completely solved!" Colleagues unanimously agreed with his opinion. After many experiments, Kato and his colleagues formally presented the successful results to the company. The company was happy to improve its products and quickly invested money to change the tops of all toothbrush bristles into rounded corners.

The improved Lion toothbrush was quickly welcomed by customers, and Kato, who made great contributions to the company, was promoted from an ordinary employee to section chief. When we discover a problem, we also discover an innovative idea and opportunity. If we complete it, we will achieve success.