Beijing reiterated its pledge to create a “single free-trade zone” incorporating mainland China, Hong Kong and Macau on Wednesday, as it seeks to deepen economic ties with the two special administrative regions (SARs) amid ongoing trade tensions with the US.The Ministry of Commerce would “explore and promote” the establishment of a unified free-trade area across the three distinct customs territories, Vice-Minister of Commerce Yan Dong said at the Belt and Road Summit in Hong Kong.It would...