With a casual glance Ch'en seems to have captured the flow of time in the hurrying figures. "Snake Oil Peddler" displays expertise in the author's camera angle, use of lighting, and grasp of the moment.
「賣藥郎」（一九六八年）一圖中，作者在取景的視角，光影的運用，瞬間的把握上，確有獨到的經驗與眼光。