Two months after warning that Beijing appeared poised to help Russia in its fight against Ukraine, senior U.S. officials say they have not detected overt Chinese military and economic support, a welcome development in the tense U.S.-China relationship.

U.S. officials have said they remain wary about China's long-standing support for Russia in general, but the military and economic support that they worried about has not come to pass, at least for now. The relief comes at a pivotal time.

U.S. President Joe Biden is preparing for a trip to Asia later this month dominated by how to deal with the rise of China and his administration is soon to release his first national security strategy about the emergence of China as a great power.