In 1960, for example, when he saw that children who didn't attend their teacher's private night classes were given extra homework, Liu, a father himself, took a series of photos expressing his distaste.
譬如民國五十年的「惡補制度」，他看到兒女們如果不參加老師私補便得回家趕做多得令人咋舌的功課時，做父親的便拍下一組連作，表達了他對教育制度的沉痛心聲。