China has reportedly issued a direct warning to Russia against using nuclear weapons in the Ukraine conflict, Ukrainian President Volodymyr Zelenskyy told reporters on Thursday. He described the communication as “ultimatum-like” in its tone, a notable departure from Beijing’s typically measured diplomatic language.

What Zelenskyy actually said

Zelenskyy’s comments referenced growing chatter in Russian media about a potential nuclear response to Ukrainian strikes on Russian territory. He framed China’s reaction as unprecedented.

“I think you heard such voices in Russian media: ‘What if we respond to Ukrainian strikes with nuclear weapons?’ And it seems to me that this was the first time China directly responded in an ultimatum-like form, that there can be no thought whatsoever of using nuclear weapons.”

The statement is significant for a few reasons. China has publicly opposed nuclear escalation since the early stages of the war in 2022. President Xi Jinping has urged restraint on multiple occasions. But Zelenskyy’s characterization of this latest communication as an “ultimatum” suggests a sharper, more forceful posture than Beijing has previously adopted.