What is the background of Qijia Dao, which can cut off other knives in Embroidered Spring Knife?

Qijia Island is also a great creation of Qi Jiguang. In the war against Japan, Qi Jiguang deeply realized the sophistication and sharpness of Japanese knives. After the war, he began to study how to use the Japanese sword and Japanese knife technology of the Japanese invaders in the battle of the Ming army. It's not easy to cut a knife. The clips in the movie seem to make sense. One is to block the blade to draw a gap, and then press the position relative to the back of the knife. If the technology is good, it is possible.

Blade brotherhood

Qijia Dao was originally used to deal with Japanese Dao. The blade is thick and strong, which just restrains the sharp but fragile blade of Japanese Dao. Compared with Japanese Dao, it is simple in manufacturing process and low in cost, and can be popularized in the military.

The blade of Qijia Dao in the film is obviously not as thick as the original. It should be made by combining the advantages of Japanese Dao, or it may be specially improved to match the use of women.

Jiguang Qi

Japanese Dao did learn from tangdao, but many ignorant cynics said that tangdao won the Japanese Dao completely, which I don't agree with. After studying Tangdao, Japan changed its development direction. After years of improvement, Japanese Dao is not worse than tangdao, and the simple use effect is even better than tangdao.

Tangdao

But the world is balanced. On the basis of extremely sharp blade and nearly perfect mechanical configuration, other aspects of weapons, such as durability, will inevitably be sacrificed. No matter how good a Japanese sword is, it will be completely damaged after killing many enemies on the battlefield, and sometimes it will be completely destroyed after only a few strokes.

Scientifically speaking, the radian of Japanese knives, the stress point of the handle and the stress point of knives are better than those of tangdao. However, the durability is poor, because the Japanese Dao became a symbol in the later period and gradually became out of practical use. During the period of Japanese samurai, civilian samurai could not afford Japanese knives at all. Although Japanese Dao is sharp and excellent in mechanics, it has poor durability and high production cost, which determines that it cannot be used as a common weapon for ordinary people.

Japanese Dao is really a good Dao, the pinnacle of personal cold weapon, but it can only be used in individual competitions. If the progress of material science develops to a certain extent in the future, then Japanese knives are still superior to most known cold weapons.