Gongshu Ban, also known as Lu Ban, was a person from the Spring and Autumn Period. It's a time when a hundred flowers are blooming and a hundred schools of thought are contending. Gongshu Ban also created its own sect called "Lu Ban Sect". The Luban Ruler is regarded as a token of the sect master. This ruler is made of meteorite iron. It is extremely sharp and cuts iron like clay. It can be used as a tool to measure the size and fortune of the family, and it can also be used as a self-defense weapon. However, after the first sect master Lu Ban and the second sect master Fu Yi, the ruler disappeared without a trace. Today, thousands of years later, Luban Ruler reappears in the world...