According to TASS, the two countries have signed a cooperation agreement.
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塔斯 is a phonetic rendering of TASS (Telegrafnoye Agentstvo Sovetskogo Soyuza). Founded 1925 as the Soviet Union's main news agency; today it's Russia's. 社 means 'agency / society' and is also used in 新华社 (Xinhua News Agency).