Which leader was a member of the communist party yet made the most changes against communism when he took office?

The leader that was a member of the Communist Party, but made the most changes against Communism when he took office was Mikhail Gorbachev.

Explanation:

Mikhail Gorbachev is a Russian politician who served as the last secretary-general of the Soviet Communist Party from 1988 to 1991.  

His attempts at reform led to a diminution and an end to the Cold War, for which he was awarded the Nobel Peace Prize, but at the same time the Soviet Communist Party lost its former political power, eventually leading to the dissolution of the Soviet Union.

the first historical instance of china engaging in internationalism was during the han dynasty.[1] at the start of the han dynasty, the huns in the north were attacking the frontiers of han and trying to obtain riches. emperor wu of han wanted to gain an alliance with a country called dayuezhi so the two countries could join together and fight against the huns.[2] to obtain this alliance, emperor wu sent zhang qian to the west to establish economic and cultural connections.[2] history records that during the han dynasty there were four primary avenues of contact between china and europe. they included the northern land route, the central land route, the southern sea route, and the far southern sea route.[1] the most famous of these routes is the central land route, or the classical silk road, comprising a network of roads stretching from northwest china to the ports of syria and the black sea, which passed through the oasis of the turkestans and northern persia.[1] the silk road was significant for chinese emperors because it provided dominance over central asia by developing resources and provided new markets for the export of china's most valuable resources.[1]