Need to prepare: bamboo pieces, rope, knives of the same size. The specific manufacturing method is as follows:

1. First, we need to prepare bamboo pieces of the same size, as shown in the figure below.

2. Next, you need to carve a groove at both ends of the bamboo piece, as shown in the figure below.

3. Next, use the rope to pass through the groove on the bamboo piece, as shown in the figure below.

4. Finally, tie the other side of the bamboo piece in the same way, as shown in the figure below.