The third and fourth Scholars' Roundtable Lunches organized by the College Life Committee of CW Chu College were held on 17 Feb and 19 April 2012 respectively. Prof. Thomas Au, fellow of the College, gave a presentation on '0 to Infinity' in which he took infinity as an example to illustrate how mathematicians think and see the world. Titled 'Behavioural Finance and Financial Behaviours', Prof Zhou Xunyu highlighted some of the basic tenets underlying modern behavioural finance theory, and discussed its relevance to the recent financial crisis and to a sustainable development of the Chinese economy.