There are sand dunes in the desert, piles of sand dunes-curves and planes; Solitary smoke is a straight tube; The long river is a strip, and the sunset is a circle.
Wang Wei is so unrestrained. Things that are so far apart are easily caught by him, forming a cross, vertical and surrounding relationship. Think of the desert as an airplane, with a solitary pillar standing on it and something like a belt floating in the distance. What a spectacular sight!