The landmark ruling was a matter for the Hong Kong and Macau Affairs Office of the State Council, a Foreign Ministry spokeswoman said. 'The relevant departments of the State Council are paying close attention to this,' Zhang Qiyue told a regular briefing. The office is answerable to the council. Ms Zhang said: 'I want to emphasise here that the central Government unflinchingly supports the principle of 'one country, two systems'. On this issue, there has been no change at all . . . Hong Kong issues are an internal matter of China.' She refused to say whether the National People's Congress could over-rule a decision of the Court of Final Appeal. The People's Daily did not mention the issue yesterday, except for a brief article datelined Hong Kong quoting Raymond Wu Wai-yung, a member of the Basic Law Committee criticising the court's decision on legal and practical grounds. One mainland economist said the reason for Beijing's anger at the decision was practical, rather than legal. 'Beijing is concerned about the impact of such a huge number of migrants on Hong Kong.'