The Democrats have launched another advertising broadside against the Democratic Alliance for the Betterment of Hong Kong (DAB), this time criticising the party's stance on labour. Last week the Democrats attacked the pro-Beijing party for its position on mainland dissident Wang Dan. In yesterday's advertisement placed in Apple Daily, the Democrats blamed the DAB for scuttling labour laws passed by the ousted legislature but undone by its provisional successor. DAB chairman Tsang Yok-sing was undaunted by the attack. 'These are just campaign gimmicks. Why bother to respond?' he asked. He suggested that the Democrats had their own 'vulnerable' points which members could attack in future debates. Democrat vice-chairman Anthony Cheung Bing-leung said: 'These voting records directly affect labour benefits and are not something we are inventing to undermine our rivals. 'The DAB has not really stood up for the grassroots and workers as they have claimed.' In the advertisement, the Democrats challenged the DAB to attend its labour forum on Sunday. 'The DAB members should come if they feel we have said anything unfair,' Dr Cheung said. But Mr Tsang said members would only attend forums organised by neutral groups. In a strongly worded statement, the DAB said that members were annoyed by the 'smear, misleading and wilful distortion' tactics. It questioned why the Democrats spent so much money on political showmanship but stopped short of offering solutions to unemployment. The DAB maintained that voting decisions were made in the interest of workers and society as a whole. Lingnan College political science lecturer Li Pang-kwong said the series of advertisements would undoubtedly undermine DAB support. 'Politically sensitive voters will base [their decisions] on this information to make their choice,' he said. He suggested that the DAB initiate new negative campaigns rather than engage in rebuttal.