HONG KONG—Hong Kong authorities declined to renew a visa for a foreign journalist working for The Economist without any explanation, the magazine said. Sue-Lin Wong, who is Australian, was based in Hong Kong and covered Hong Kong and China. “We regret their decision. … We urge the government of Hong Kong to maintain access for the foreign press, which is vital to the territory’s standing as an international city,” Zanny Minton Beddoes, The Economist’s editor-in-chief, said in a statement Friday. Immigration authorities did not immediately respond to an email request for comment. Phone calls to the information office outside of business hours went unanswered. Many have worried about the erosion of press freedom in a city that was once a bastion for it. Last week, a survey by the Hong Kong Foreign Correspondents’ Club found nearly half its members were considering leaving the city. They said they were concerned about …