2:40 PM MYT HONG KONG (SCMP) known to the world as a model free-market economy, as in Milton Friedman’s Free to Choose TV programme, or a city with a stunning skyline, as in Christopher Nolan’s The Dark Knight – has joined Tibet and Xinjiang as one of China’s human rights trouble spots. Australia, a long-time trade and investment partner of Hong Kong, went out of its way before 1997 to enact a special statute to grant Hong Kong’s economic and trade office in Sydney immunities and privileges. Yet, after China enacted a national security law for Hong Kong, Australia asked its nationals to reconsider remaining in the city. Australians were warned they could be “at increased risk of detention on vaguely defined national security grounds”.