Demand for round-the-clock operation of border checkpoints is not strong and rushing implementation will not benefit either Hong Kong or the mainland, says Hong Kong's trade representative in Guangzhou. Leung Pak-yan, head of the Hong Kong Economic and Trade Office in Guangzhou, yesterday said it would not be cost-effective to open the checkpoints 24 hours a day. He said the business community in Guangdong shared this view. 'It will not be cost-effective if we start to operate round-the-clock opening of checkpoints now,' he said in an interview with Commercial Radio. Mr Leung urged greater co-operation between Hong Kong and Guangdong. One way to achieve that was to make information about investing in the province more accessible, he said, adding his office had liaised with 21 cities, all of which had promised to supply better information.