Liu Chien-sin or Jason Liu (traditional Chinese: 劉建忻; simplified Chinese: 刘建忻; pinyin: Liú Jiànxīn; born 8 June 1968) is a Taiwanese politician. He was appointed as the Deputy Secretary-General to the President on 21 April 2018, and the acting Secretary-General to the President on three occasions the latest being on 2 August 2020. He served short tenures for each appointment. Liu was appointed as the Secretary-General of the Examination Yuan on 1 September 2020.