TVB then recruited Kong as a child star, and she has since then appeared in dramas such as The Greed of Man and State of Divinity.
She also filmed Twin of Brothers, alongside Raymond Lam, Ron Ng, Tavia Yeung and Li Qian of CCTV.
Although The Last Breakthrough did not receive good ratings in HK, it is still remembered and favoured by many as one of the most meaningful and touching series TVB ever made.
The following year, in 2008, she filmed The Greatness of a Hero in TVB, starring as Shangguan Wan'er, a well-known historic figure.
She once again collaborated with Kenneth Ma in a new ancient drama, Man in Charge, alongside Kate Tsui.
The couple met during a collaboration of the stage play, Popcorn Killer (爆谷殺人狂), and dated for three years.
Kong uploaded a photo of herself and Tang on Weibo on 10 September 2010 to announce their engagement, with the comment "To all my good friends, thank you all for being by my side to witness my growth.
In January 2015, Kong announced the birth of her second child, a baby girl delivered via caesarian section.