On 22 October 2008, Legislator Hung Hsiu-chu of the Chinese Nationalist Party injured an eye of Kuan’s parliament assistant (PA) while pushing a poster away during a budget review session of the National Science Council in the Education and Culture Committee, so Kuan stood up in argument with Hung till finally slapped Hung's face and Hung pinched Kuan's cheeks, and both legislators refused to apologize. Kuan states: "When one is faced with repression, one should stand straight, refuse to give in and fight against oppression and hegemony." Hung launched a lawsuit against Kuan for two years until a judge persuaded both sides to reconcile with each other, and shared chocolate together in peace on 29 July 2010.
