On Sunday, European Commission President Ursula von der Leyen said the EU does not yet have evidence that China is supplying any weapons to Russia.
"So far, we have no evidence to it, but we must follow the situation daily," she told a joint news conference with German Chancellor Olaf Scholz.
Turning to possible sanctions against Beijing in the event of its military assistance to Moscow, she said, "This is a hypothetical question that can only be answered when it becomes real."
The President of the European Commission participated in a meeting of the German government on Sunday as a guest of honor.
US Secretary of State Anthony Blinken claimed on February 18 that China was considering supplying weapons and ammunition to Russia that could be used in Ukraine.
Pentagon spokesman Patrick Ryder also mentioned that the US military had not recorded any arms transfers from China to Russia but did not rule out that China was looking into such an option.
In response, Chinese Foreign Ministry spokesman Mao Ning said that the Chinese authorities would not tolerate US threats and pressure over Moscow's alleged military support.