- Xu Shiyin (许诗茵)
- English name: Valentina.
- Nickname: Small V/ Xiao V (小V)
- Birthday: 95/02/03.
- Birth place: Shanwei
- Position: Lead Vocal, composer.
- Talents: Piano
- Color: White
- Weibo
- Instagram: @sy_valentina
- Debuted with 柒月 (Seven Months) on Jul 17th, 2016.
- Third generation trainee.
- Produce101's contestant.
- Singles participation:
- 16/07/26 - 柒月 (July)
- 16/08/10 - 加油加油 (Jiayou! Jiayou!) (Fighting)
- 16/09/07 - 音律进化 (Sound Evolution)
- 16/09/09 - 造梦王国 (Dream Kingdom)
- 16/10/25 - 未完成的素描 (Unfinished Sketch)
- 16/11/28 - 爱情经纬线 (Love's coordinates)
- 17/05/12 - RUN FOR MORE
- 17/07/05 - 战（王者荣耀版同人曲) (WAR) Re-release
- 17/07/27 - 123木头人 (123 Wooden Man)
- 17/08/22 - 快乐循环 (Happy Cycle)
- 17/09/17 - 冒险时代 (Adventure time)
- 17/09/26 - 寄明月 (Moonlight Thoughts)
- 17/11/02 - 如梦令 (Dreamy Chant)
- 17/11/15 - Like This
- 17/12/07 - 寄明月 “入骨相思” (Moonlight Thoughts "The Marrow Lovesickness") Mobile game “Fantasy Westward Journey” version）
- 17/12/14 - 最亮的光 (Light Up My Dream)
- 17/12/29 - SING女團同名專輯 (Self-tittle album)
- 18/01/24 - 团团圆圆 (Reunites; Reunion)
- 18/03/14 - 白衣少年 (White Dressed Youth)
- 18/04/18 - 倾杯 (Inclined Cup)
- 18/05/18 - 一不小心到古代 (Accidentally to the Ancient Times)
- 18/07/06 - 夜笙歌 (Night Carousing)
- 18/07/20 - 云裳谣 (Cloud Dressed Rhyme)
- 18/08/25 - 不羡 (Do Not Envy)
- 18/09/14 - 未来的约定 (The Promise of Future)
- 18/09/20 - 神谕法则 (The Law of God)
- 18/09/23 - 秋风辞 (The Phraseology of Autumn Wind)
- 18/10/22 - 风华叶舞 (Dance of Elegance Leaf)
- 18/11/05 - 前尘 (Preexistence)
- 18/11/17 - 寄明月 (Moonlight Thought) English version
- 18/11/21 - 千年 (The Millennium)
- 18/11/30 - 仙缘再续 (Fate of Fairy Carries On)
- 18/12/24 - 圣诞愿 (Christmas Wish)
may 9 2018 ∞
feb 9 2019 +