(Reporter Tian Bing) The Central Clinical Hospital of the Presidential Administration of the Russian Federation announced on the evening of the 30th that Mikhail Gorbachev, the last leader of the Soviet Union, died at the age of 91 due to ineffective medical treatment. In 1985, he served as general secretary of the CPSU Central Committee and chairman of the Soviet Defense Committee. In 1988, he was elected chairman of the Presidium of the Supreme Soviet of the USSR. In 1989, he was elected chairman of the Supreme Soviet of the USSR at the first Soviet People's Congress.