Birth Name: Cheng Xiao (程瀟)
Stage Name: Cheng Xiao (程瀟) (성소)
Birthday: July 15, 1998
Place of Birth: Shenzhen, China
Birth Flower: Rose (lovely)
Posisi : Main Dancer, Sub Vocal, Face Of The Group
Height: 167 cm
Blood Type: B
Sub-Unit : Wonder Unit, Y-Teen, Sunny Girls
- Cheng Xiao introduced formally on December 10, 2015
- She appeared in “Luv Again” UNIQ
- She can dance traditional Chinese dance
- She has a flexible body
- Ex- SM Entertainment trainee along with Bona, Luda & Yeonjung
- She practiced martial arts in Shenzhen, China
- Her role model are Victoria f(x) & Bora Sistar
- She won the gold medal at ISAC (Idol Star Athletic Championship) for rhythmic gymnastics 2016
- She has a younger sister.
- She can play the guzheng.
- She is a member of the Performance team.
- She appeared in UNIQ MV titled “Happy New Year”
- She was born in the year of the tiger.
- She introduced herself that pure and barbie doll.
- She can dance traditional chinese dance.
- She has a baby face and glamorous body.
- She has a cuteness and sexiness.
- Close with CLC Elkie & Sorn, LOVELYZ Yein, Fiestar CaoLu, Twice Sana Momo Tzuyu & Mina, Gugudan Sally & Nayoung, Oh My Girl Yooa, Momoland Nancy, Gfriend Eunha, Pristin Pinky.