HONG KONG • A majority of US companies in Hong Kong surveyed by the American Chamber of Commerce (Amcham) are concerned about the sweeping new national security law in the city, with a third of these firms looking to move assets or business in the longer term.

The new legislation, which punishes secession, subversion, terrorism and collusion with foreign forces with up to life in prison, has further strained relations between the United States and China.

The Amcham survey - published yesterday and to which 183, or 15 per cent, of the chamber's members responded between July 6 and July 9 - showed 36.6 per cent of respondents were "somewhat" concerned and 51 per cent were "extremely concerned" about the legislation.

More than two-thirds of the respondents were more concerned than a month ago, when the full details of the law were unveiled. The legislation, which sees a Chinese intelligence agency openly operating in the city for the first time and gives police and mainland agents broad powers beyond the scrutiny of courts, raises a broad spectrum of worries for US companies.

Some 65 per cent were concerned about the "ambiguity in its scope and enforcement" and roughly 61 per cent were concerned about the independence of Hong Kong's judicial system.

About half were concerned about the city's status as a global finance centre and the erosion of the high degree of autonomy it was promised 23 years ago.

Other major concerns cited were data security, talent drain and retaliatory measures by other governments. The prospect of extraditions to China, where the courts are controlled by the Chinese Communist Party, was considered a "game changer" by about 46 per cent, with 17 per cent saying it was not.

About 49 per cent said the law would have a negative impact on their business, while some 13 per cent said it would have a positive impact.

Some 30 per cent considered moving capital, assets or business out of Hong Kong in the medium-to-long term, while 5 per cent said they would consider doing so in the short term. Also, about half said they personally considered leaving the city.

REUTERS