During the period of the new democratic revolution, the Communist Party of China had three "leftist" doctrines, namely: Qu Qiubai's "leftist" blind activism, Li Lisan's "leftist" adventurism, and Wang Ming's "leftist" dogmatism.
1.There is a tendency to be dogmatic in theoretical understanding, and there is a lack of practical guiding significance.
2.The tendency of closed-door doctrine on the political line is divorced from the masses and loses the support of the people.
3.The dogmatic tendency in strategic decision-making has led to the loss of base areas and central cities.
4.Sectarian tendencies in organizational building have caused great harm to the cause of the party and the people.
The issue of "left" and right-leaning within the party is a problem in the understanding of the party's political line. In any historical period, the party's political line and political tasks are not arbitrary, nor are they eternal. The errors of "left" and right-leaning are all produced under specific conditions, and the root cause of these errors lies in the subjective overly optimistic or pessimistic estimation of the objective situation and the insufficient grasp of the laws governing the movement of social contradictions.