Common yi-ko include "Tung Han Looking For His Mother" and "The Cowherd and the Weaving Maid." But while the themes are different, the form is identical. There are a number of classifications for chent'ou.
藝閣常見的內容有哪吒鬧東海、董漢尋母、郭子儀遇織女星等，但這只是取材不同，形式都一樣。