Russia has been actively cooperating with Chinese companies to bypass Western sanctions and ensure the production of drones used against Ukraine, Bloomberg reports. Documents reviewed by Bloomberg, including memos from the company,

Ukraine said it struck a Russian air base on Saturday, while Russia continued to attack Ukraine with hundreds of drones overnight as part of a stepped-up bombing campaign that has dashed hopes for a breakthrough in efforts to end the more than 3-year-old war.

Ukraine’s Ministry of Defense is claiming that more than 800 Russian soldiers were killed over the weekend, along with the destruction of dozens of armored vehicles.