China’s armed forces secretly trained about 200 Russian military personnel in China late last year and some have since returned to fight in Ukraine, according to three European intelligence agencies and documents seen by Reuters.While China and Russia have held a number of joint military exercises since Moscow’s full-scale invasion of Ukraine in 2022, Beijing has repeatedly stated that it is neutral in the conflict and presents itself as a peace mediator.For the latest updates on the Russia-Ukraine war, visit our dedicated page.The covert training sessions, which predominantly focused on the use of drones, were outlined in a dual-language Russian-Chinese agreement signed by senior Russian and Chinese officers in Beijing on July 2, 2025.The agreement, reviewed by Reuters, said about 200 Russian troops would be trained at military facilities in locations including Beijing and the eastern city of Nanjing. The sources said around this number subsequently trained in China.The agreement also said hundreds of Chinese troops would undergo training at military facilities in Russia.By training Russian military personnel at an operational and tactical level who then participate in Ukraine, China is far more directly involved in the war on the European continent than previously known, one intelligence official said.The Russian and Chinese defense ministries did not respond to requests for comment on the details outlined in this article.“On the Ukraine crisis, China has consistently maintained an objective and impartial stance and worked to promote peace talks, this is consistent and clear and is witnessed by the international community,” China’s foreign ministry said in a statement to Reuters. “Relevant parties should not deliberately stoke confrontation or shift blame.”The intelligence agencies spoke on condition they not be identified in order to discuss sensitive information.European powers, which see Russia as a major security threat, have watched warily at increasingly close relations between Russia and China, the world’s second largest economy and an important European Union trade partner.The two nations announced a “no limits” strategic partnership days before Russia’s invasion of Ukraine in 2022 and pledged to conduct military exercises to rehearse coordination between their armed forces. As the West tried to isolate Russia, China provided a lifeline by buying its oil, gas and coal.Chinese leader Xi Jinping is due to host Russian President Vladimir Putin on Tuesday and Wednesday, less than a week after US President Donald Trump’s high-profile visit.China and Russia have cast Putin’s trip - his 25th visit to China - as further evidence of their “all-weather” partnership, even as the West urges Beijing to pressure Moscow into ending its war in Ukraine.