Xu Jiaqi was a member of SNH48's Team SII as well as its international sub-unit 7senses. She is born in Taizhou, Zhejiang, China in the year 1995. She has 7 years of experience in ballet and is also known for her supporting role in the historical drama "Legend of Yunxi," playing Chu Qingge. She is a rapper, dancer, and singer. In 2020, she joined iQiyi's survival show "Youth with You" and finished in 3rd place with 9,086,752 votes. On May 30, 2020, she debuted with the final debut line of Youth With You girl group "THE9." Her fandom name is "Blackis" and is under Shanghai Star 48 Culture Media. She graduated from SNH48 Team SII on October 14, 2020. 서가기(1995년생, Wenzhou, Zhejiang, China) 는 배우로, 대표작으로 魔天劫, 萌妹特攻队가 있으며, 그 외에도 당조궤사록 : 당 왕조의 괴이한 사건 기록, 极限挑战, 투라대륙 2: 연혼전, 萌探探探案, 初入职场, 做家务的男人, 演员请就位, 青春有你, 超新星运动会, 听说很好吃, 귀녀, 灵魂摆渡·十年 등 다양한 작품에 출연했다. 특히 2026년에는 灵魂摆渡·十年에도 참여해서 활동중이다. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2026년 灵魂摆渡·十年에 출연했다. 2026년 임암 : 어둠과 새벽 사이에서 Ye Xiaoai 역을 맡았다. 2026년 幻世에서 Lina 역을 맡았다.