Dao are single-edged Chinese swords, primarily used for slashing and chopping. The most common form is also known as the Chinese sabre, although those with wider blades are sometimes referred to as Chinese broadswords. In China, the dao is considered one of the four traditional weapons, along with the gun (stick or staff), qiang (spear), and the jian (sword). It is considered “The General of All Weapons”. (source)