Yet, despite Chang's statement, Wu was notably absent from their album promotions, and on May 6, 2009, he confirmed her departure from both Hey Girl and Channel V's management.
In 2007, Wu announced her acting debut with the idol drama, Brown Sugar Macchiato.
Andy Chang later announced that Hey Girl did not belong to the Channel V Management, and thus, Gui Gui would still be attending the promotional activities per usual.
In February 2013, she was cast in the Korean reality show, We Got Married with Ok Taecyeon, of South Korean boy band 2PM, as her virtual husband.In her early childhood, the family moved frequently, and this resulted in her having to attend five different elementary schools.Wu briefly attended the Dao Jiang Senior High School of Nursing & Home Economics (臺北市私立稻江高級護理家事職業學校) before transferring to Zhuangjing Senior Vocational School in the Xindian District of Taipei, where she became classmates with JPM's Wang Zi.), and launched their first self-titled album in August 2008.Captivated by her natural charisma and bright personality, high words of praise from those of her directors and costars brought new opportunities and opened doors that allowed for Gui Gui to further expand her acting career outside of Taiwan.As of mid-2012 to early 2013, Gui Gui has been spending much time in the Mainland China region, filming a three part-movie series "The Four" with Ronald Cheng, Anthony Wong, Deng Chao, and Liu Yifei.