Choy notably broke ranks of her party to vote with ists for the preservation of Queen's Pier. She joined democrats to oppose application for HK$50 million to fund the dismantling and relocating of the pier on 9 May 2007. Choy, however, abstained in a re-submitted request for funds to dismantle and relocate Queen's Pier two weeks later. She revealed that she had been lobbied by Michael Suen and Donald Tsang; party did not allow her to cast an opposing vote, and the government won by 10-7.
2008 Legislative Council elections
Choy was placed second to on the DAB list for the Hong Kong Island geographical constituency in the . Choy lost her seat reportedly because the party's vote was split with Regina Ip, who was the candidate endorsed by the DAB in the Hong Kong Island by-election, 2007.
She is also the of Huafeng Group, a textiles company listed in Hong Kong.