The center of gravity of the golden ratio sword

The golden ratio of the center of gravity of the sword is 3 1. The first and most important point is to use hand cards. The advantage of the hand is that the size is in proportion to your body. Hold the sword with one hand, protect the hand, and extend the arm vertically, with the tip of the sword reaching at least the earlobe.

All the way to the top of the ear. It is also said that stretching the arm should not exceed the length of the fingertip. Can't be shorter than the wrist.

The historical development of knives

A single-edged combat weapon used for chopping. Consists of a knife body and a handle. The blade is long and narrow, thin and thick. Handle can be divided into short handle and long handle. The former is held in one hand and usually used with a shield. The latter needs to be held with both hands, and the chopping range is wider. One of the main combat weapons equipped by the ancient army.

Stone knives in Neolithic Age and bronze knives in early Bronze Age in China can be regarded as the embryonic form of knives. Bronze broadsword of Shang dynasty, with wide blade and inclined tip, can be used in combat. Some stick exquisite patterns on the back of knives, but few are found. There is also a bronze knife, which is deployed with Ge and Gong Ya.

Close defense, the total length is only about 30 cm, and the handle end is decorated with animal heads such as horses and sheep, or made into a ring. Special-shaped bronze knives with holes in the back were also used in Shang and Zhou dynasties, which can hold long handles, but few were found.