- Lin Hui (林慧)
- English name: Haha.
- Nickname: Haha (哈哈), Big face Ha Ha (大脸二哈)
- Birthday: 96/10/09.
- Birth place: Yongzhou.
- Position: Lead Vocal.
- Talents: Guzheng (Chinese tranditional instrument)
- Color: Yellow.
- Weibo
- Instagram: @hahalinnn
- Member since debut.
- Second generation trainee.
- Singles participation:
- 15/08/12 - 青春的告白 (Youth Confession)
- 15/09/07 - 听见夏至 (Hear the Summer Solstice)
- 15/11/11 - BULU BULU
- 15/12/16 - 灵儿想叮当 (Merry Xmas to U)
- 16/01/14 - 爱情猎手 (Love Hunter)
- 16/02/01 - 恭喜恭喜 (Gongxi Gongxi)
- 16/03/03 - 甜蜜具现式 (Sweet formula)
- 16/03/04 - KISS ME
- 16/03/21 - 战 (War)
- 16/04/06 - 偷偷喜欢你 (Secretly Like You)
- 16/04/21 - 重要的话说三遍 (Important Words Three Times)
- 16/05/04 - 不二情书 (Love Letter)
- 16/05/05 - 飞过时间的海 (Flying over the Sea of Time)
- 16/06/17 - 繁星 (Stars)
- 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)
- 16/11/21 - 爱情经纬线 (Love's coordinates)
- 17/02/14 - 背对着想念 (Miss You)
- 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)
- 17/12/07 - 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)
- 18/01/18 - 想带你到霭霭晨光里 (Bring You to the Cloudy Morning)
- 18/01/24 - 团团圆圆 (Reunites; Reunion)
- 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)
- 18/09/08 - 风花错 (The Error of Wind and Flower)
- 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 +