China on Monday defended barring the head of Human Rights Watch from entering Hong Kong, saying non-governmental organisations were to blame for political unrest in the semi-autonomous city and should "pay the proper price". "Allowing or not allowing someone's entry is China's sovereign right," foreign ministry spokesman Geng Shuang said at a regular press briefing, a day after Kenneth Roth said he was denied entry into Hong Kong. tjx-lth/rox/fox