At present, China is in a period of social transformation, and a remarkable feature of rapid social transformation is that social optimization and social problems coexist, and social progress and social costs coexist. The new generation of migrant workers with more than 1 100 million people are in school age. At present, their primary problem is marriage. After the promulgation of the Labor Contract Law, the rights and interests of the new generation of migrant workers have improved compared with the previous generation, but they are still not guaranteed. From the previous analysis, we can see that although the new generation of migrant workers have high career expectations, they are limited by their low professional skills. Even if they are willing to get rid of the low-level working conditions of selling coolies, they generally feel powerless. They can only engage in marginal occupations, such as dirty, bitter, tired and dangerous, which city people don't want to do. The employment environment is poor, the working hours are long, the workload is heavy, the labor remuneration is low, it is difficult to protect their basic rights and interests, and they can't enjoy the due national treatment. Marx once pointed out: "The basis of morality is the self-discipline of human spirit". Once the new generation of migrant workers enter the new urban environment, the cohesion of rural social norms loses, and the original moral behavior is anomie (that is, the loss of self-discipline). In this way, the new generation of migrant workers are unwilling to return to the countryside, and cities cannot integrate. Their psychological expectations are higher than their parents' and their endurance is lower than their parents'. When the city is in trouble, poverty and singles are combined under the chain reaction of low professional skills, poor economic income, no house, discrimination and no wife.

On the other hand, due to the restriction of household registration, although the new generation of migrant workers are positioned as urban residents, the city is not ready to accept them. On the contrary, there are both economic thresholds, quality thresholds and welfare thresholds. Even so, they are still reluctant to return to the countryside. It means that the countryside is not a retreat. It also means that the new generation of migrant workers must rely on the work and life of the city, and the policy concept of treating the countryside as a "reservoir" is completely outdated. In this way, the new generation of migrant workers can only live in the urban fringe and the old city with low rent and concentrated floating population. Most of the contacts are fellow villagers, and the social structure is characterized by simplification and closure, forming an island. There, weak information, weak development opportunities, weak resource regeneration, weak labor contact, and the economic effects of poverty and isolated islands often mean lack of development opportunities and disconnection from mainstream society. They are in the situation of a city or a country, in a dilemma, facing the state of double marginalization and increasing poverty.

Because they have no household registration and their employment is restricted, it is difficult to transform the "equal employment right of workers" stipulated in Article 3 of the Labor Law from paper rights to property rights. The new generation of migrant workers who enter the city often have to pay a higher price than the citizens in order to work. Most migrant workers can only enter the secondary labor market and look for "surplus" jobs for some urban people. It is difficult to gain the accumulation of status resources, let alone realize the upward flow of status. The source of life determines the way of life and attitude towards life. Without work, there will be no dependence, which will make these people in an uncertain state and have the characteristics of vagrants, and become a hidden danger that may hinder social stability and harmony at any time. Among the cases in Hangzhou in 2008, the crime rate of the new generation of migrant workers born after 1980 accounted for more than 70%. Recently, large-scale investigation reports of three major prisons in Guangdong show that 90% of migrant workers are under the age of 26. And because of the development of information network media, they are more likely to be organized to speak with one voice, and social contradictions are more likely to be expanded and intensified. If we continue to exclude them from the system, marginalize them and ignore their material, spiritual, cultural and democratic political needs, they will be more prone to resentment, which is not conducive to social security and stability. This deserves our vigilance!

A harmonious society is not a society without contradictions, but a society in which social contradictions can be gradually eliminated and properly solved. "It is the innate instinct of thoughtful people to ask for improvement of their material conditions. This desire cannot be eliminated. It is the driving force of all human behaviors. People meet their own needs by expanding their activities, thus moving towards a happy society. If this road is blocked, there is only one way for people to go: to suppress and plunder others to make themselves rich and make others poor "(Mises's" The Country of Freedom and Prosperity ").

The differences and difficulties faced by the new generation of migrant workers and the old generation of migrant workers challenge the current urban management policy. In addition, this challenge will become more and more obvious and urgent.