BEIJING — China has criticized Washington’s opposition to Chinese-made next-generation telecoms technology after Vice-President Mike Pence called on Iceland and other governments to find alternatives.A foreign ministry spokesman, Geng Shuang, accused American leaders Friday of “abusing the concept of national security” to block commercial activity by Chinese companies.China’s Huawei Technologies Ltd. is a leader in next-generation, or 5G, technology. But Washington says Huawei is a security risk, an accusation the company denies.Pence said during a meeting this week with Iceland’s prime minister, Katrin Jakobsdottir, that Washington wants to “work with Iceland and other freedom-loving nations to find alternatives to essentially China’s state-based 5G operation.”The Associated Press