Tangdao has four styles, namely Tang Heng Dao, Tang Mo Dao, Tang Yi Dao and Zhang Tang Dao, which are collectively called tangdao. Among them, the horizontal knife is the most famous, also known as the "single-edged knife", and it is also the direct ancestor of the Japanese Japanese knife. The cavalry in the Tang Dynasty could chop and kill sunder armor with a horizontal knife. Second, strange knives are mainly used to deal with cavalry. "If you advance like a wall, your troops will be broken." This shows the terrible power of the strange knife.
Tangdao was developed on the basis of han dao and adopted the forging process of han dao Baishui Steel. Not only the treatment method of impurities in steel during forging is improved, but also the "Baotou Steel" technology is adopted, which makes tangdao hard on the outside and soft on the inside, and has strong toughness. Tangdao has not only greatly improved the forging process, but also greatly improved its appearance, widening the blade body and lengthening the handle so that tangdao can hold it with both hands. This not only makes tangdao look better, but also has more actual combat performance and durability, which can greatly improve the armor-piercing ability and split any contemporary armored equipment. Tangheng Road and Tangmo Road are the representatives of Tangdao Road.
Tangdao, called "the peak of cold weapons" by many historians, has played an extremely important role in all previous battles. In 747 AD, Tang Jun conquered Tubo, and Mo Dao led Li's more than 5,000 Mo Dao soldiers and defeated the Tubo army. In the Battle of Baijiangkou in 663 AD, 10000 Tang Jun, equipped with tangdao, wiped out 50,000 enemies almost effortlessly, and honestly fought for hundreds of years.
Tangdao is too expensive. Tangdao forging process is complicated, the construction period is long, and the price is much more expensive than ordinary swords. According to the appraisal of Jiaohe County in the second year of Tang Tianbao, the worst tangdao Yao 1800 yuan in the Tang Dynasty cost several times as much as ordinary Jian. The better tangdao is, the more expensive it is. It is said that many people in the Tang Dynasty went bankrupt in order to own a tangdao. Although the Song Dynasty was rich in financial resources, the imperial court emphasized the suppression of weapons, and tangdao, a big killer, was naturally neglected.
Tangdao was very popular in the Tang Dynasty, because it was light and easy to carry, and extremely sharp, so it could be taken by surprise when going into battle to kill the enemy. After Song Dynasty, tangdao was no longer used as a weapon. The main reason should be related to the policy of valuing literature over martial arts in Song Dynasty. Secondly, the production cost of tangdao is relatively high, and there are cheaper and easier-to-replace weapons in the Song Dynasty.