Books of the time on painting theory record how people even put on all kinds of competitions, and debated such questions as whether a peacock walking on the ground first lifts its right foot or its left. This reveals the depth of their observation and the heights of their skill.
當時的畫論中還有人作各種比賽，辯論孔雀走路時是先抬右腳還是左腳，可見觀察之入微與技巧之精湛。