"At that time those in the fine arts world saw traditional Chinese painting as a 'dead art,' and paid it little attention." But, owing to his experience as an illustrator, Cheng had discovered that, "The free brushwork and color effects of Chinese water and ink painting turns out to be just right for depicting Chinese history or legendary martial arts heroes."
「當時國畫被美工界視為『僵屍畫』，沒人重視」，鄭問基於插畫經驗卻發現，國畫中水墨的揮灑與渲染效果相當適合表現中國歷史或武俠人物。