Deng did little to improve poor relations with Brezhnev and the Kremlin during his early rule. He continued to adhere to the Maoist line of the Sino–Soviet split era that the Soviet Union was a superpower as "hegemonic" as the United States, but even more threatening to China because of its close proximity. Relations with the Soviet Union improved after Mikhail Gorbachev took over the Kremlin in 1985, and formal relations between the two countries were finally restored at the 1989 Sino-Soviet Summit.