Having entered the cave, Wu beckoned to the emperor from inside, but the emperor was unable to go in. Soon the door closed. No one knew where Wu had gone, while the wall, white as before, showed not the slightest trace of ink.
道子進洞後，以手招皇上，明皇卻不能入，不久門閉，誰也不曉得吳道子何處去了，而畫牆竟瑩白如舊，沒有半點餘墨。