Shih Hsien-hua, a native Taiwanese, was learning Mandarin at a supplementary school in 1949 when he was implicated in an espionage case involving his teacher. He was imprisoned on Green Island for 13 years.
本省籍的施顯華，民國三十八年因為參加國語補習班而受老師匪諜案的牽連，服了十三年徒刑。