Complex sentence: Mao Zedong visited Moscow from December 1949 to February 1950 to establish closer ties with the Soviet Union as well as to receive economic assistance and renegotiate the previous 1945 Treaty made between the USSR and Republic of China.
Split into simpler sentences: Mao Zedong visited Moscow from December 1949 to February 1950 to establish closer ties with the Soviet Union as well as to receive economic assistance. Mao also wanted to renegotiate the previous 1945 Treaty made between the USSR and Republic of China.