1. Within New China, as the war against Japan took place within China, it severely damaged industry and agriculture. Productivity dropped dramatically. The country's lack of capital created a large surplus labor force. These people had nothing to do all day long and fostered the idea of uproar and trouble. Under the influence of Lin Biao and the Gang of Four, there was even the Cultural Revolution movement. It even came to the verge of a fire fight between the two factions.

2. From 1972 to 1979, China and the United States conducted marathon-like negotiations around the Taiwan issue. Finally reached an agreement that the U.S. military withdrew from Taiwan, the U.S. and Taiwan no longer have official exchanges, and the U.S. and China once again issued an affirmation that Taiwan belongs to China. China's bad external conditions gradually eased. But China's capital market was still backward, and there were serious shortages of goods. So the state encourages entrepreneurship, urban industry is booming, and in the coastal areas there are also township and village enterprises are springing up.

3. After China's accession to the World Trade Organization (WTO), this period was called the technology era. Because of its accession to the WTO, China had the opportunity to compete on an equal footing with the West. Western powers saw China's cheap labor market. A large number of multinational corporations flooded into China to invest. While investing, they also introduced new industrial technologies into China.

4, the era of innovation, this era, China's infrastructure has basically been finalized. The market for goods is also gradually saturated. Although there is a gap between the rich and the poor, the goods used by the people are differentiated by grade.

After 1956, the socialist transformation was basically completed, and China entered the primary stage of socialism. The Eighth National Congress of the Party pointed out: "The main contradiction in our country is already the contradiction between the people's demand for the establishment of an advanced industrialized country and the reality of a backward agricultural country, and the contradiction between the people's demand for the rapid development of economic and cultural development and the current situation where the economy and culture cannot satisfy the people's needs. The main contradiction within our country is already between the people's demand for the establishment of an advanced industrial country and the reality of a backward agricultural country.

The essence of this contradiction, in the case of China's socialist system already established, is the contradiction between the advanced socialist system and the backward social productive forces. The main task of the Party and the people of the country at present is to concentrate on solving this contradiction and transforming our country as soon as possible from a backward agricultural country into an advanced industrial country."

But due to the Party's overestimation of the class struggle and the widening of the anti-Rightist struggle, as well as the Party's lack of experience in leading socialist construction, the Party's guiding ideology suffered a "left-leaning" error, and failed to stick to the main social contradiction.

Baidu Encyclopedia - The Founding of New China