In this photo released by Xinhua News Agency, Russian Foreign Minister Sergey Lavrov, left, and Chinese President Xi Jinping meets at the Great Hall of the People in Beijing on April 9, 2024. China has surged sales to Russia of machine tools, microelectronics and other technology that Moscow in turn is using to produce missiles, tanks, aircraft and other weaponry. That's according to two senior Biden administration officials who discussed the sensitive findings on the condition of anonymity. Russia's microelectronics came from China, which Russia has used missiles, tanks and aircraft. (Li Xueren/Xinhua via AP)