What two things did the Soviet Union do that helped bring about the Sino-Soviet split?

Russia denied financial aid to China when its Great Leap Forward failed.
Russia kept its treaty with India even though India was at war with China.
Russia refused to help Red China as it developed a nuclear weapons program.
Russia would not help China back the North Vietnamese attempt to unify Vietnam.

Question

What two things did the Soviet Union do that helped bring about the Sino-Soviet split?

Russia denied financial aid to China when its Great Leap Forward failed.
Russia kept its treaty with India even though India was at war with China.
Russia refused to help Red China as it developed a nuclear weapons program.
Russia would not help China back the North Vietnamese attempt to unify Vietnam.

t-dawg02 · Answer

After an intense exchange of insults over several years, Khrushchev withdrew Soviet aid from China in August 1960. The resulting Sino-Soviet split cut through the entire world Stalinist movement irrevocably.