Is the ancient Chinese sword casting technology lost?

The disappearing skills are few and far between, and most of them disappeared simply because they were eliminated.

During the Bronze Age, the blade of a weapon could not be made too long or it would break easily. Therefore bronze swords of the time were made shorter and had thicker ridges. If you're really interested in traditional techniques, you can go to a large museum and see them at a glance.

Then came the Iron Age, the Spring and Autumn and Warring States Periods, and up to the Han Dynasty, when blacksmiths made the world-famous ring-headed swords. Ring head knife no matter blade length, hardness and also sharpness, are far more than the bronze knife. Therefore, the bronze knife is not lost, but eliminated. No matter what myths and legends and nationalists say, it was in fact eliminated by the iron sword. After that, horse combat began to emerge on a large scale. The ring-headed sword, being a straight-edged sword, was not suitable for horse combat and was eliminated by the curved sword. Note that it wasn't lost, rulers and swordsmiths weren't that stupid to give up a skill for a simple reason: something adapted to the battlefield came along to replace it. Then came heavy armor. Generals fought, riding large horses and wearing armor, and so did their opponents. To deal with such an enemy, heavy weapons were needed, such as lances, such as the great lance.

How to use the big lance? Two generals fighting, riding against, big long lance in hand, as if the cone of broken armor, straight to the other side of the armor, through the armor. At this time, what is the use of your machete tang knife? Heavy armor environment, the role of the spear are very limited. The long spear's broken armor relies not on the edge, but the weight of the spear head and the force of the horse's forward charge. Imagine a heavy long lance head, with the long pole pointing forward, the war horse forward, the long lance head straight to the enemy general's chest, that kind of armor-breaking power ...... regardless of the curved sword or, tang knife or, it does not adapt to the battlefield situation changes, so naturally, was eliminated. This period, the big long lance is still just a microcosm of the change of weapons in the hands of generals.