Choy's loss of her seat was reportedly because the party's vote was split with Regina Ip, who was the candidate endorsed by the DAB in the 2007 Hong Kong Island by-election.
In the 2003 election, she almost lost out to Leung Kwok-hung ("Long Hair"), as part of the fallout from widespread public dissatisfaction with incumbent pro-government representatives across the board, while in the 2007 election she successfully saw off a challenge by fellow government supporter and Fujian elder Charles Chiang Yu-tui, winning 75 percent of the vote.
[8] In 2008, Choy was appointed a Hong Kong Deputy of the National People’s Congress and is therefore an ex officio member of the Election Committee.
She revealed that she had been lobbied by Michael Suen and Donald Tsang; party whips did not allow her to cast an opposing vote, and the government won by 10–7.
[11] Choy is a non-executive director of Ping Shan Tea Group, an investment holding company listed in Hong Kong.