The next morning, Qiao Duo'er and Tan Zhenghong went to the field together, pulling a rice bucket, to thresh the grains.
Threshing was simple: the bundled rice was smashed and hit against the horizontal wooden planks inside the rice bucket, causing the grains to fall into the bucket, while the remaining straw could be saved for fire.
This method was primitive and its drawbacks were obvious.
That was, too many grains remained on the straw, necessitating a subsequent manual check.
While picking up grains, Qiao Duo'er reminisced about the threshing machine she saw at the museum.
That must be more advanced than this.
It looked approximately like a cylinder with many small iron arches and a pedal which, when stepped on, would cause the cylinder to roll and dislodge the grains.
Later, with the advent of electricity, the pedal-operated threshing machines were replaced by electric ones, but the basic principle was the same.