Because it is feared that too many ghosts might show up, the poles are kept under 30 meters high and, on the night of the sacrifice, priests chant scriptures and sound gongs and drums to multiply the offerings from one to ten, ten to a hundred, and so forth.
但為了怕鬼魂來得太多，祭品不夠享用，一般多半只豎二、三丈高，而且在普渡當夜，由道教高僧「坐座」誦經，敲鼓鳴鐘，將祭品一化為十，十化為百，百化成千，稱為「化食」。