Sun Sheng Xi (; born 13 November 1990), also known as Shi Shi (), is a Taiwanese-South Korean singer, songwriter and record producer.
In 2019, Sun won the Golden Melody Award for Best Mandarin Album for her fourth studio album, Shi's Journey. It was also her first win at the music awards.
Sun was born in Korea but later moved to Taiwan in order to pursue her music career. Sun participated in season 2 of Chinese Million Star, and finished in 6th place. In 2015, she was nominated for Best New Artist at the 26th Golden Melody Awards.