1. First flatten the bamboo board with a knife, and then polish it smooth for later use.
2. After grinding, saw the bamboo board into 2 and 4 sections, as shown in the figure.
3. Hold the nail with pliers, and then put the nail on the fire to burn it red.
4. After the nail burns red, drill two holes on the top of the bamboo board with the nail.
5. Drill two holes at the top of all bamboo boards, as shown in the figure.
6. After drilling the hole, tie the four short bamboo boards together with a rope, as shown in the figure.
7. Tie two long bamboo boards together.
8. done.