Complex sentence: In May 1989, President Gorbachev visited the People's Republic of China, whose government were ambivalent about "perestroika" and "glasnost", his reform programs, which ultimately ended communist government and provoked the dissolution of the Soviet Union in 1991.
Split into simpler sentences: In May 1989, President Gorbachev visited the People's Republic of China, where the government was ambivalent about his reform programs of "perestroika" and "glasnost". Ultimately Gorbachev's reforms ended communist government in Russia, and provoked the dissolution of the Soviet Union in 1991.