China Has Helped Russia Boost Arms Production, U.S. Says

China has helped Russia revive its military production at a critical stage in its Ukraine war, providing Moscow with optics, microelectronics, drone engines and other dual-use material that have significantly strengthened Moscow’s battlefield capabilities, senior Biden administration officials said Friday.

In the last quarter of 2023, China provided Russia with more than 70% of its nearly $900 million in machine-tools imports, which Moscow has likely used to build ballistic missiles, the officials said. 

For all of 2023, 90% of Russia’s microelectronics imports, crucial for the production of missiles, tanks and aircraft,...