After reading the Romance of the Three Kingdoms, we know that soldiers can be invulnerable when they enter and leave the battlefield after wearing the armor covered by Kato. This is also Zhuge Liang's earliest secret weapon to break Meng Huo. But Zhuge Liang didn't use such good equipment when he was here. Because this equipment is good, but once the enemy takes fire attack, it will be completely annihilated. This is the shortcoming of this equipment and it is afraid of fire.

In fact, in ancient times, conditions were limited, and we knew that it was impossible to have almost "invincible" armor like Fu Jia. After all, wearing protective gear is to better protect the lives of soldiers. In addition to the toughness of protective gear, soldiers' armor should not be too load-bearing because it is too heavy. After all, the load-bearing capacity of soldiers is limited, and fighting on the battlefield is very exhausting. Although rattan nail is very light, it can reduce the load, but rattan nail is a plant and cannot be as strong as iron. Reducing weight at the expense of defense is often counterproductive.

According to ancient records, rattan nails need to be soaked in tung oil for a period of time, and it usually takes about 49 days to make them. Because the material is wild rattan, so light weight is very advantageous; The texture is harder after soaking. It is said that it can defend against swords, guns, bows and arrows and will not sink. It seems invincible, but it is not.

According to legend, Buyi people also have this kind of "rattan nail" production process, but the whole production process is very long, so it takes about two years, and the processing method is complicated, so it is very time-consuming. Moreover, rattan armor is not really invincible, but has fatal defects, such as fear of fire. Zhuge Liang personally defeated the Fujia Army with fire attack tactics. Zhuge Liang doesn't want to use rattan armor, which is very troublesome and particularly time-consuming. Maybe this is also an aspect.