Final answer:
Khrushchev's de-Stalinization efforts and calls for 'peaceful coexistence' with the West, along with his refusal to supply nuclear weapons to China, significantly strained Sino-Soviet relations.
Step-by-step explanation:
The de-Stalinization efforts of Nikita Khrushchev had a significant impact on Soviet relations with China, leading to strained relations between the two countries. Due to Mao Zedong's admiration for Stalin and his disapproval of Khrushchev's denunciation in 1956, as well as differing views on the approach to global communism, the Sino-Soviet relationship deteriorated. Additionally, Khrushchev's refusal to provide China with nuclear weapons and the Soviet Union's support for India during the 1962 Sino-Indian War further widened the rift. The ideological split, which highlighted China's disdain for the Soviet's “peaceful coexistence” policy with the West, played out in various international arenas, as both nations sought to influence developing countries and establish supremacy as the leader of the Communist world.