If Biden defends Taiwan, China must attack the United States with a nuclear attack before it attacks, diplomats say in a cool message to the west.

If Joe Biden continues to defend Taiwan, China must make its first nuclear attack on the United States, says China's top diplomat. Former UN ambassador to Beijing, Sha Zukang, said the country's long-standing commitment to using only nuclear weapons in retaliation should be revisited in response to the new alliance formed in the region. He states: "Unconditional no first use of nuclear weapons is not appropriate, unless the US-China negotiations agree that neither side will use it. [nuclear weapons] First, otherwise the United States will no longer take passive steps to undermine the effectiveness of China's strategic strength. "As (US)…