In the Han Jian era, metallurgical technology did not reach its peak. The sword in Tang Dynasty is the peak of China's cold weapon smelting. Great achievements have been made in technology and art, which is the peak of China's sword history. In the world, only Damascus sword can compare with it.

Unfortunately, due to frequent wars, foreign invasions and dynasty changes, tangdao's skills of Tang Jian were not preserved, so that the skills of sword refining in Yuan, Ming and Qing Dynasties were not as good as those in Tang Dynasty. Only Japanese kept the technology of tangdao's Tang Jian. Today's Japanese Dao, or Mountain City, is the Japanese version of tangdao.

In World War I, 30,000 Tang Jun (including 1 10,000 foreign mercenaries) killed nearly 200,000 Arab Coalition forces. If ten thousand foreign mercenaries in Tang Jun hadn't suddenly defected and cooperated with the Arab army, the Tang Empire would have won. Tang Jun's fierce fighting capacity can be seen. In addition to Tang Jun's powerful fighting capacity, it is also an invincible weapon in his hands.

Four blades made in the Tang Dynasty; One is an instrument knife, one is an enchantment knife, the third is a horizontal knife, and the fourth is a stranger knife. They are all good at drinking blood, especially unfamiliar knives.