Henry Tang Ying-yen admitted yesterday having made a 'mistake' that damaged the bond with his wife and undermined his popularity. The confession came more than a month after he admitted publicly that he had 'strayed in his love life'. But he stopped short then of calling it a mistake. The former chief secretary said yesterday that he had struggled with himself before coming out to admit his marital infidelity. 'My wife has forgiven me. I hope members of the public also forgive my mistake,' he said. 'We should concentrate on addressing challenges facing Hong Kong, rather than getting entangled with [a person's] private love life.' Although he did not name anyone, Tang's admission early last month drew Shirley Yuen, his former administrative assistant and now chief executive officer of the Hong Kong General Chamber of Commerce, into the saga. Yuen strongly denied she had been involved with him romantically, expressing 'deep anger' at the rumours. Tang said he had passed the government's integrity checks for principal officials before he joined the administration. As if to distance himself from Yuen, Tang also stressed yesterday that his mistake had nothing to do with his public office or any official. He declined to comment on rumours that he had a child out of wedlock. Political analyst Dr James Sung Lap-kung said he believed Tang only wanted to buy time by making a partial confession. 'It may be his new public relations strategy. But it is too early to say if it will work. The worst part is that he still declined to answer reporters on the issue of an illegitimate child. The media will keep chasing that because it is juicy,' Sung said. 'After he formally announces his candidacy [in the chief executive election] later this month, he hopes the public focus will be on his platforms and who his supporters are.' Meanwhile, Tang said returns from Mandatory Provident Fund accounts were not enough to support a dignified post-retirement life. He proposed that on top of their existing MPF accounts employees set up voluntary MPF contribution accounts managed by the Monetary Authority, which would not charge management fees. The MPF schemes have been criticised for their high management fees. But Dr Li Kui-wai, associate professor of economics and finance at City University rejected the idea. He said it would defeat the original aim of the MPF scheme and he did not see why the Monetary Authority should manage a pension scheme as well.