Would anyone really be willing to buy a CD of Donald Tsang Yam-kuen whistling the national anthem, as he famously did last year before a meeting with soon-to-resign former chief executive Tung Chee-hwa? 'It would probably become a big hit,' Mr Tsang said yesterday, perhaps with more confidence than most in the music business. But our salesman-turned-politician was not considering yet another career change. He was merely trying to illustrate to students at Chinese University that he believes dreams and reality are different. Mr Tsang said that in his position he could not afford to have dreams - be they dreams of stardom or the immediate introduction of a minimum wage. 'When I filled out the nomination form for the chief executive election last year, I listed my occupation as 'politician', and I am still being teased about that. If I'd said I'd like to be a singer, the public would make even more jokes about it.' The remarks were seen as a pointed reference to the dozens of banner-waving students who blocked his way outside the auditorium, protesting for a minimum wage and standard working hours. 'As a person in public office, of course, I have to talk about responsibility. But young students must talk about ideals and dreams and don't have to address reality,' Mr Tsang said. 'I hope they continue to have their passions and implement their beliefs after they graduate. Perhaps, slowly, they will know that [dreams] are not so easy to execute.' The chief executive pointed to British Prime Minister Tony Blair and late patriarch Deng Xiaoping as examples of politicians who had ditched ideology to do the right thing at the right time. While mahjong has never appeared on Mr Tsang's CV as a hobby, he used a mahjong metaphor to make the point that there are no second chances in politics. 'In doing business, as in playing mahjong, you may earn back everything you've lost in one single big deal, or with a set of 'same patterns' to recover the losses of nine failures. But this never happens in politics,' he said.