Cheng Xiao (WJSN)

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Cheng Xiao - Biography, Profile, Facts, and Career

Before her name become very well-known, Cheng Xiao initially started her career path as an idol when she left her home at 16 years old.

At that time, she tried some agencies, such as JYP and SM, as a trainee before becoming a trainee at Starship Entertainment.

After doing a lot of practice at Starship, she was finally announced as a member of WJSN on December 11, 2015.

On the same day, she was also announced as a Wonder sub-unit member alongside Bona and Dayoung.

On 25th February 2016, she finally debuted with the group by releasing Would You Like? as the first EP.

She became a part of Sunny Girls with some other members from different girl groups and released Taxi on November 27, 2016.

One year later, she participated in Swan Club in September and Idol Producer Chinese Version in December.

Other than being with the group, Xiao also has some solo activities. She became a cast member in Law Of the Jungle (2017).

She was also in reality survival show Idol Producer in 2018 as a dance mentor.

On 20th August 2018, Cheng Xiao then appeared in Pajama Friends as a host with Jang Yoonju, Song Ji-hy, and Joy from Red Velvet.

Still in 2018, this singer was casted in TV series Legend of the Awakening. She also starred in Detective Chinatown in 2020.

In 2021, Xiao would take part in more series such as The World of Fantasy, Falling Into Your Smile, and Lie to Love.


  • Real Name: Cheng Xiao (程瀟)
  • Stage Name: Cheng Xiao (성소)
  • Korean Name: Jeong Seong So (정성소)
  • Nickname: Xiao Xiao, Milk Xiao, Shenzhen Sister
  • Birthday: July 15, 1998
  • Birthplace: Shenzhen, Guangdong, China
  • Zodiac Sign: Cancer
  • Nationality: Chinese
  • Height: 166 cm (5’5″)
  • Weight: 51 Kg (112 lbs)
  • Blood Type: B
  • Religion: –
  • Profession: Singer, Actress
  • Education: Shenzhen Art School, School of Performing Arts Seoul
  • Hobbies: –
  • Parents: –
  • Siblings: –
  • Boyfriend: –
  • Facebook:
  • Twitter: @chengxiao_0715
  • Instagram: @chengxiao_0715
  • Tiktok: –
  • Youtube: –
  • Weibo: chengxiao0715

See Full Cosmic Girls (WJSN) Members


  • Cheng Xiao is a part of Wonder and αγυρτηςsub-units.
  • She has a sister who is younger than her.
  • She becomes the representative of Cancer in the group.
  • Cheng Xiao is able to play guzheng.
  • She made an appearance for YTeen alongside Seola, EXY, Dayoung, Soobin, Eunseo, and Yeoreum.
  • She became a trainee at 16 years old.
  • She joined a high school which has a distance of thirty miles.
  • Actually, she is bad at pronouncing her name.
  • F(X)’s Victoria is her big role model.
  • She has a flexible body.
  • She once got a gold medal on ISAC for Rhythmic Gymnastics.
  • In front of the camera, she won’t talk very much but will be talkative when she’s off-camera.
  • She once became a trainee of JYP Entertainment.
  • She is good at flipping something with her hand.
  • She became a mentor for Idol Producer.
  • She does sky diving alongside Xuan Yi.
  • Xuan Yi becomes a part of Sunny Girls alongside Nancy from MOMOLAND, YooA from OH MY GIRL, Eunha from GFRIEND, and Nayoung from Gugudan.
  • She became the main actress for Legend of Awakening in 2019.
  • She said that her ideal type is someone who is like Lee Min Ho.
  • She once joined SM Entertainment as a trainee.
  • Cheng Xiao idolizes Joy from Red Velvet so much.
  • For her, meeting her fans is the best thing as a big idol.
  • Actually, she dislikes wearing glasses.
  • She has been learning the traditional Chinese dance for approximately ten years.
  • She is good at mobile games.
  • Xiao loves cats and has one named Susu.
  • Her ideal type is someone like the actor Lee Min Ho.

Pics of Cheng Xiao  

1. Who is cuter? She or her cat?

Cheng Xiao Cosmic Girls (WJSN) - Biography, Profile, Facts, and Career

2. Cheng Xiao looks so classy with that wide hat

Cheng Xiao Cosmic Girls (WJSN) - Biography, Profile, Facts, and Career

3. She turns into a glamour girl

Cheng Xiao Cosmic Girls (WJSN) - Biography, Profile, Facts, and Career

4. An amazing performer on stage

 Cosmic Girls (WJSN) - Biography, Profile, Facts, and Career

5. Cheng Xiao looks so perfect in a red tone

 Cosmic Girls (WJSN) - Biography, Profile, Facts, and Career

Cheng Xiao is really a huge idol. She is so humble, creative, charming, and talented. Who doesn’t love her, anyway?