China says there will be "no room for negotiation" in its demand that US airlines describe self-ruled Taiwan as part of China ahead of a deadline this week.
Taiwan separated from China amid civil war in 1949 but Beijing continues to claim it as its own territory.
Foreign Ministry spokesman Geng Shuang said today that China hopes the US government will urge businesses to follow China's requirements.
He did not specify how China would punish defiant carriers, saying only that it will "wait and see." The White House has previously criticised the Chinese demand as "Orwellian nonsense.
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