Top Chinese envoy warns US not to cross its ‘red line’ ‘ONE CHINA’ POLICY: While urging the US to rebuild ties, Yang Jiechi told Washington not to meddle in Taiwan, Hong Kong, Xinjiang and Tibet Bloomberg China’s top diplomat yesterday warned the US not to cross the country’s “red line,” in a pointed speech that pushed back against early moves by US President Joe Biden to press Beijing on human rights. Yang Jiechi (楊潔篪), a politburo member and head of the Chinese Communist Party’s foreign affairs office, said in a video address to the New York-based National Committee on US-China Relations that the two sides “stand at a key moment” to rebuild ties and cooperate after Biden’s inauguration.