WASHINGTON, March 22 (Reuters) - China is "very carefully" watching how Washington and the world respond to Russia's invasion of Ukraine, but has not yet crossed the line of providing lethal aid to Moscow, U.S. Secretary of State Antony Blinken said on Wednesday. "The stakes in Ukraine go well beyond Ukraine. However, he said he did not believe that China has been providing lethal aid to Moscow. "As we speak today, we have not seen them cross that line," Blinken told a Senate Appropriations subcommittee hearing, the first of four times he will testify to congressional committees this week. "The post-Cold War world is over, and there is an intense competition under way to determine what comes next," Blinken said.

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