Several news outlets are writing articles about the US sharing intelligence reports with China. Some are saying that China turned around and shared those reports with Russia.

This from Leftist, the NY Times.

U.S. Officials Repeatedly Urged China to Help Avert War in Ukraine

Americans presented Chinese officials with intelligence on Russia’s troop buildup in hopes that President Xi Jinping would step in, but were repeatedly rebuffed. 

This from Socialist website Axios. 

China told Russia about U.S. intel on invasion.

Why would you go to Russia's number one best friend China, and give them Intelligence reports?