The United States has seen no evidence of China providing direct military assistance to Russia for its war in Ukraine, but has expressed concern about contributions to the Russian defense industry. This was stated by the US National Security Advisor Jake Sullivan during a briefing on April 9, UNN reports.
We have not seen any evidence that they'll provide direct military aid to Russia, but we have expressed our concerns about inputs to Russia's defense industrial base
At the same time, he indicated that he could not "comment or characterize" the meeting between Chinese President Xi Jinping and Russian Foreign Minister Sergei Lavrov the day before, because he "did not actually have the opportunity to get acquainted" with this issue.
Recall
On April 9, Chinese leader Xi Jinping met with Lavrov in Beijing, which CNN called "another sign of the importance China is placing on its increasingly strong ties with Moscow." The meeting between Lavrov and Xi Jinping is said to be their first in six years and is notable because heads of state do not necessarily meet with visiting ministers.