Why did Albania break diplomatic relations with China?

First of all, due to the shortage of domestic supply, China has reduced its aid. Secondly, China did not inform Albanian Nixon of his visit to China in advance, which made him distrust China. Thirdly, the relaxation of Sino-US relations made Albania think that China deviated from the anti-imperialist and anti-revisionist line and surrendered to imperialism.

1976, after the gang of four was crushed, the Cultural Revolution ended. Albania, which had always supported China's Cultural Revolution, thought that China had completely turned into a revisionist country (like the Soviet Union), so it expelled China's advisers and experts in Afghanistan and became an anti-China depth bomb. Since then, relations have deteriorated sharply.

1978, Deng decisively decided to stop aid to Albania. Coupled with the drastic changes in Eastern Europe ten years later, Albania became a capitalist country and the relations between the two countries gradually normalized.