With two days remaining before what is expected to be a huge pro-democracy march on Thursday, Chinese authorities are clamping down to prevent news of the demonstration from spreading on the mainland, while leading democrats here have split over tactics. Mainland tourists have flooded Hong Kong in the past year, taking advantage of a relaxation of Chinese exit-visa rules that was intended to help the economy here. The annual commemoration here on June 4 of the 1989 Tiananmen Square killings drew large numbers of mainlanders this year, watching silently an event that would have quickly been broken up by the police if it had occurred anywhere else in China. But travel industry officials say China has cut back very sharply this week on the number of mainlanders allowed to be in Hong Kong during the march on Thursday, which will protest Beijing’s decision not to allow general elections here.Full Story