Chen Hsin-hung (Chinese: 陳信宏; pinyin: Chén Xìnhóng; Jyutping: Can4 Seon3 Wang4; Pe̍h-ōe-jī: Tân Sìn-hông); Pha̍k-fa-sṳ: Chhîn Sìn-fên, nicknamed Ashin (Chinese: 阿信; pinyin: Āxìn; Jyutping: Aa3 Seon3; Pe̍h-ōe-jī: A-sìn; Pha̍k-fa-sṳ: A-sìn), born 6 December 1975, is a Taiwanese singer-songwriter, author, and the vocalist of the Taiwanese band Mayday. Ashin majored in art in college, where he also began his musical career.

He is also the founder and designer of the clothing line StayReal and a shareholder of the music label B'in Music. He was elected as a board member of the Taiwan Public Television Service in 2013.