Yang began her career in 2000 as a member of Taiwanese girl group 4 in Love, where she was given the stage name Rainie.The group's popularity in the musical industry achieved limited success.In 2014, Yang signed to EMI Taiwan, a revived label that is now a subsidiary of Universal Music Taiwan.
However, after co-starring in Spider Lilies, Yang returned to her previous cute image by becoming the leading role in the drama Why Why Love, with Mike He and Kingone Wang, which aired during the summer of 2007.
She subsequently released her third album, My Other Self on 7 September 2007.
In 2012, Yang starred in the romantic short film, Heartbeat Love, with Show Lo.
On 17 August 2012, she released her seventh studio album Wishing for Happiness.
Yang was born and raised in Taipei, Taiwan, her father's ancestors were from Guangdong, China. By the time she was 13, she had to start working because her father's business failed, which led to her parents being divorced.