How did the ancients produce or make sewing needles or fishhooks?

Everyone knows that the ancient people's technology was underdeveloped, and some of their metal utensils could not be as exquisite as modern ones. However, since ancient times, there have been exquisite iron products such as fishhooks and sewing needles, so the wisdom of the ancient people cannot be easily underestimated. First, sewing needles is not like something ground into needles in novels and movies, but can only be heard as a joke. If it did appear, I guess the ancients would have starved to death. In ancient times, hot wire was drawn into a slender strip and then smashed into a sharp shape with a hammer.

In ancient times, at that time, metals such as iron could not be used well, just as Shang Chao was just a bronze tripod symbolizing imperial power, and ordinary people could only use stone products. It is difficult to make those exquisite things out of stone, so another thing takes its place, that is, bones. The wisdom of our ancestors is an opportunity to compete with the sky for survival. The fishbone of marine fish is a natural sewing needle, but it is not a fishhook with a little modification. And there are a lot of fish bones with good shapes to choose from.

By the Song Dynasty, iron products had become very common. Generally, artisans draw hot iron into silk, divide it into small pieces, then cool it with iron tools such as a small hammer to make it into a sharp shape, and then smash it out with an iron cone to make the back hole a simple sewing needle. The hook is easier to make. The simple fish hook in ancient times was made by grinding the metal wire directly and matching it with a pointed hook.

Not only that, the ancients also invented a mold, which directly introduced molten iron and cooled it to form a complete appliance. The disadvantage of this method is that it can't make articles with complicated internal structure, but only simple iron products such as weapons and civilian tools. But even so, it was extremely rare in that era when technology was extremely underdeveloped.