Biography

Cheng Xiao, born in Shenzhen, China, is a member of the Chinese-South Korean girl group, WJSN. She signed under Yuehua and Starship Entertainment. Cheng studied tradition Chinese Dance for 10 years before moving to Korea and training to become an idol. She attended Shenzhen Art School but transferred to School of Performing Arts in Seoul, Korea.

Cheng trained as an idol in Korea for 10 years. In February 2016, she debuted in the thirteen-member girl group, WJSN, otherwise known as Cosmic Girls, in their wonder unit. In the same year, Cheng also was a part of Inkigayo's Music Crush project in Sunny Girls, with the song 'Taxi'.

In 2018, Cheng Xiao went back to China to promote WJSN and become the dance mentor on the music survival show, Idol Producer. She debuted as an actress in the 2020 'Legend of Awakening' and 'Detective Chinatown'.

Cheng released OSTs for dramas and promotional music videos. In January 2020, she officially debuted as a solo artist with the single 'Focus X'. Cheng is yet to return to WJSN and the group continues to promote without any of its Chinese members.
- IMDb mini biography by: IMDB

Known for her flexibility and won Gold in rhythmic gymnastics at the Idol Star Athletics Championships XII.

Has admitted that she cannot pronounce her own name - but it's not clear which one she was referring to... her Korean name (Jung Seong So), her Chinese name or her stage name.

As of 2022 is listed as "on hiatus" from WJSN (Cosmic Girls).

Belonged to sub-unit of Cosmic Girls/WJSN called "Y-Teen" under label Monsta X. Seola, Exy, Soobin, Eunseo, Yeoreum, and Dayoung were also in this sub-unit.