Zhang began her career in South Korea signed SM Entertainment and released debut single "Timeless" in September 2006 and later the Chinese version of "Timeless" were released in 2007 in Taiwan.
Zhang officially entered the chinese music scene in 2008 with released her first studio album I Will. In 2009, her second single "Moving On" were released. Zhang released two singles: "Agape" and "Not Alone" in 2014, five years after the release of "Moving On".
^ abRecording Industry Association of Korea chart:
I Will: "2008. 3 월 - 가요음반 판매량" [March 2008 K-Pop Record Sales Volume] (in Korean). Recording Industry Association of Korea. Archived from the original on February 1, 2009. Retrieved December 20, 2020.
Timeless: "2006.9월 - 가요음반 판매량" [September 2006 K-Pop Record Sales Volume] (in Korean). Recording Industry Association of Korea. Archived from the original on September 27, 2007. Retrieved December 20, 2020.
^Five Music chart: "吳克群點播銷售榜通殺 封5冠王". Apple Daily (in Chinese). April 13, 2008. Retrieved December 20, 2020.
^"2008. 3 월 - 가요음반 판매량" [March 2008 K-Pop Record Sales Volume] (in Korean). Recording Industry Association of Korea. Archived from the original on February 1, 2009. Retrieved December 20, 2020.
^Hito Chinese Pop Songs chart: "Hito 中文排行榜: 2008年 第15周 (2008-4-11)" [Hito Chinese Pop Songs: 2008-4-11]. Inkui (in Chinese). Archived from the original on July 16, 2014. Retrieved December 21, 2020.
^"2006년 - 가요 총결산 판매량" [2006 Total K-Pop Sales Volume] (in Korean). Recording Industry Association of Korea. Archived from the original on February 1, 2009. Retrieved December 20, 2020.