ISTANBUL China on Thursday urged the US to “exercise caution in its words and actions on the Taiwan issue,” calling it an internal affair. China considers Taiwan a "breakaway province," while Taipei has insisted on its independence since 1949. “The US should adhere to the one-China principle and the three Sino-US joint communiques, and exercise caution in its words and actions on the Taiwan issue,” Foreign Ministry spokesperson Lin Jian said at a press briefing in Beijing. His remarks followed