Fernando Chui Sai On (Chinese: 崔世安; pinyin: Cuī Shì'ān; born 13 January 1957) is the current Chief Executive of Macau, he was the Secretary for Social and Cultural Affairs from 1999 to 2009.Chui was born in 1957 to local construction tycoon Chui Tak Seng and Chan Keng Fan, the second son after Chui Sai Cheong. Through his marriage he is related to the late Hong Kong tycoon Henry Fok Ying-tung, uncle to his wife Winnie Fok Wai-fun.