US intelligence finding shows China surging equipment sales to Russia to help war effort in Ukraine

China is backing Russia's war effort in Ukraine by helping Moscow in its biggest military buildup since the Soviet era, providing drone and missile technology, satellite imagery and machine tools, senior U.S. officials said on Friday.

The officials, speaking on condition of anonymity, said U.S. President Joe Biden raised the issue with Chinese President Xi Jinping in their recent phone call and that it is a topic of discussion with U.S. allies in Europe and around the world.

One official said Chinese materials are filling critical gaps in Russia's defence production cycle and helping Moscow undertake its "most ambitious defence expansion since the Soviet era and on a faster timeline than we believed possible early on in this conflict."