At one five-star hotel in Macau, it has become impossible to tell apart the security guards, valet-parking attendants, front-desk receptionists and waiters. For almost two weeks now, they have all been wearing the same uniforms. David Chow Kam-fai, who heads the five-star Landmark Hotel and three-star Emperor Hotel, is facing tough competition in his re-election bid for Macau's legislative assembly. One of his marketing strategies is to have all his employees wear his yellow-and-green campaign T-shirts during their working hours. However, first-time visitors quickly become confused, particularly mainlanders, who seldom witness an election. 'I thought it was odd,' said one mainland tourist, Jenny Zeng, who stayed at the Landmark. 'I was wondering who had designed such a strange hotel uniform.' There has been a record number of registered voters for Sunday's election, and candidates have been forced to launch far-reaching campaigns. By law, campaigning can only start two weeks before polling day, imposing additional time constraints. Back in 1988, when registered voters numbered only about 30,000 and two-thirds turned out, marketing a candidate to the small community was cheaper and less demanding. At the time, only Portuguese nationals were allowed to vote, which meant that campaign platforms could be targeted to deal with the concerns of a small group of people. This year, with 220,618 registered voters, campaigning techniques have had to evolve - from face-to-face encounters and rallies to more sophisticated strategies that reach as many voters as possible. Of course, all must be within the campaign spending ceiling, even though many of this year's candidates are probably billionaires. Chan Ming-kam, owner of the Golden Dragon Casino, also owns one of Macau's largest electrical-appliance retail chains, property in the harbourfront Dynasty district and a tour agency. Instead of walking through the northern district neighbourhoods to meet voters and hand out brochures, he has been holding rallies to boost the morale of workers. With candidates needing about 9,000 votes for a seat on the assembly, Mr Chan might feel that he has done enough to convince people to vote for him. Mr Chow's tactics of putting his employees in campaign 'uniforms' could also prove a vote winner - and such a move does not count towards the campaign spending ceiling of 4.3 million patacas. 'These workers get paid because of their labour, not because of the uniform they wear,' said Fong Man-chong, president of the Electoral Commission.