In addition, the two communist powers disagreed on doctrinal matters. The Chinese accused the Soviets of "revisionism"; the latter countered with charges of "dogmatism."
Rivalry within the international communist movement also exacerbated Sino-Soviet relations.
An additional complication was the history of suspicion each side had toward the other, especially the Chinese, who had lost a substantial part of territory to tsarist Russian expansion in the mid-nineteenth century.
Whatever the causes of the dispute, the Soviet suspension of aid was a blow to the Chinese scheme for developing industrial and high-level (including nuclear) technology