Cheng was originally marketed as a member of the group
3T (along with
Mandy Chiang and
Maggie Lau), which released an EP in 2002. She was the sole member of the group who went on to release a solo EP later that year. This was followed by a second EP,
DanceDanceDance () and her first full-length album
One2Three, in 2003. In 2004, she released the album,
Perfect Date, though made a decreasing number of media appearances due to health problems and an overall strategy re-evaluation within her company. 2005 saw a return with the lead single 'Arabian Market' (), complemented by a novel image that featured her in traditional Arabic dress. She would continue covering Middle-Eastern pop hits in subsequent singles such as 'Lupine Girl' (, originally sung by
Aneela Mirza) in 2006, and 'Five Centuries' (, OT:
Bechom Shei In The Heart of Tel Aviv by
Sarit Hadad) in 2008, which became a minor hit in its own right in the Chinese dance charts, and was even mentioned in a report by a major Israeli newspaper. ''Yumiko's Space'', the 2005 album to which 'Arabian Market' () belonged, otherwise showed an 80s disco and electronic influence. Veteran music producer Carl Wong () took on songwriting and production credits for 6 songs, including that of the second single 'Think' (). Electronic pop duo
PixelToy also contributed one song, who again appear with songwriting credits on Cheng's 2008 Mandarin album
Spectacular Era (). Cheng has interviewed in the past that ''Yumiko's Space'' remained a personal favourite of all her albums. Aside from a career in pop music, Cheng has starred in several films, including a special guest appearance in
Stanley Kwan's 2005 feature,
Everlasting Regret. In August 2015, Cheng left Emperor Entertainment Group after 15 years, and has since focused on acting for mainland television dramas as well as developing her clothing label, "Why So Cool". ==Wardrobe malfunction incidents==