[3] On 28 March 2001, Lee was assaulted by notorious organized criminal and legislator Lo Fu-chu during a meeting of the Legislative Yuan's Education and Culture Committee,[4] after she implied that he had attempted to interfere with the selection of board members for a public educational institution that was experiencing a corruption scandal and called him a "gangster".

Lee apologized after the incident, but did not heed calls to resign for the purportedly wrongful accusation against Twu.

[10] In May 2008, opposition Democratic Progressive Party politicians accused Lee of holding United States citizenship while sitting in the Legislative Yuan after winning the 2008 Republic of China legislative election on 12 January 2008, in contravention of nationality and election laws.

[1] On 16 January 2009, the American Institute in Taiwan issued a letter to clarify that under United States nationality law, a person may lose U.S. citizenship by committing certain acts with the intention of losing U.S. citizenship, as long as the person's conduct after the said act is consistent with that of a non-U.S. citizen.

[2] In February 2010, Lee was found guilty in the Taipei District Court of fraud and forgery relating to the citizenship issue.