(2) Wrong trend: the anti-rightist struggle expanded in 1957; In 1958, he launched the Great Leap Forward and the People's Commune Movement. Cultural revolution. (3 points)
(3) Reason: Objectively, it is because people need a process to understand complicated things; Subjectively, it violates the principle of seeking truth from facts and dogmatizes Marxism; Democratic centralism was destroyed; Did not correctly handle the "left" and right relations. (4 points) (just answer 2 points)
Analysis of test questions: This question is a short answer, and you can answer it according to the knowledge of the textbook. 1956-1966 was the exploration period of China's economic development, during which there were both successful experiences and failed lessons. As far as successful experience is concerned, Mao Zedong's On Ten Major Relationships, the policy of the Eighth National Congress of the Communist Party of China and the eight-character policy of 196 have all made certain achievements. In terms of mistakes, it is mainly caused by left-leaning mistakes. Such as the Great Leap Forward and the people's commune movement. The unprecedented Cultural Revolution began in 1966. The reasons for these mistakes are that there is no ready-made experience for reference in China's economic construction, which requires a process of understanding, which violates the guiding ideology of seeking truth from facts, serious personality worship, and great damage to democracy and the rule of law.
Comments: Several stages of development after the founding of the People's Republic of China need to be understood. 1949-1952 was a period of economic recovery and development; From 1953 to 1956, there were three major transformation periods; 1953-1957 was the period of the First Five-Year Plan, during which the three major reforms and the First Five-Year Plan were carried out simultaneously. 1956-1966 was the exploration period of the national economy for ten years; 1966-1976 was the ten-year Cultural Revolution. 1976-1978 was a wandering period; After 1978, it was a new period of reform and opening up.