Wubei Zhi (Vol. 34)

Nowadays, in the various regions famous for their expertise with the Crossbow original: nu (弩), none of them utilize the Ancient Mechanisms original: guji (古機); referring to the bronze trigger assemblies used in the Han Dynasty. Instead, they exclusively use Deer Horn original: lujiao (鹿角) to construct the trigger.

If the String-wrap original: xianlu (弦簏); the reinforced binding at the center of the crossbow string is thick, once it enters the horn trigger, it fits the string snugly. original: bao bi xuan ye (襃比玄也). The character xuan (玄) is used here as a shorthand for string (弦). However, if the equipment is flimsy? and the string is thin, then the trigger will strike but the string will not release.

For this reason, I have followed the ancient models to manufacture a small [bronze] mechanism. I also tested the single Sight original: gui (規); literally "gauge" or "rule," acting as a rear sight found on ancient mechanisms, but upon careful examination, it was still not very accurate. I subsequently modified the sight into the shape of the character “凹” The Chinese character ao (凹) is shaped like a concave notch or a "U," functioning as a rear-sight notch. By aligning the arrowhead through the center of this notch, and then aligning the arrowhead with the enemy, I found that there were no misses.