This was not like a sketch, but more like a few transparent negatives overlapping together. Different scenes, through the combination of virtual and real lines, were perfectly integrated into the same painting! There was a feeling of space passing by, which strongly showed the man's busyness and concentration at work. The rough lines and delicate strokes existed at the same time, which made the contrast of the painting extremely strong. The strong contrast brought a stronger visual impact on people who viewed this artwork, which would make people unknowingly focus their eyes on the figure.