With the most critical drill bit in hand, he immediately began to craft the other components of the bow drill.
First was the bow; he found a willow branch about a meter long from the pile of firewood and carved shallow string grooves at both ends with his Hunting Knife.
Then, he bent down and untied one of the laces from his high-top hiking boots.
Facing the camera, he presented the sturdy nylon lace: "In the wild, every item on you is a potential tool. This lace is strong and incredibly tough, making it the perfect material for a bowstring."
Lin Yu'an tied one end of the lace into the willow branch's string groove, then bent the stick with force and tied the other end tightly as well, completing a simple yet sturdy bow drill.
Next was the handle, more specifically, the hand drill cap.
He found a palm-sized, hard stone to hold the end of the drill rod and reduce friction.
Finally, the most crucial piece—the drill rod.
