Cheng, using his training in archeology and the concept of "correlation," is able to link together a single sample with pieces from the same culture found nearby, allowing him to draw conclusions with confidence and to bring his creative abilities into play while remaining true to the original.
而擁有考古學養與訓練的鄭永國，可以從「集合」的概念，將單件標本與同一文化的周邊器物做連結。這樣，他就敢自信地作判斷，能揮灑，但是又能中的。