Not Russia, but China........
https://theasiadialogue.com/2015/10/...the-falklands/
.......Beijing’s tradition policy is to explicitly support Buenos Aires’ claims to the Falklands. In December 2011 then Chinese President Hu Jintao’s special envoy Jiang Shusheng, and chairman of the Standing Committee of the National People’s Congress, said “solidarity with Argentina on the Malvinas issue is an invariable position of China’s foreign policy”. China is keen to emphasize the alleged parallels, in her view, between the Falklands and Taiwan. Both Beijing and Buenos Aires believe the wishes of the population involved to be no bar to their territorial claims. The PRC may also be interested in the natural resources, oil and fisheries, found around the islands. In addition, China may also see the Falklands through the prism of her growing interest in the Antarctic.......