What is the root of the indifference of passers-by?

No, it turns out that this altruistic behavior of helping others is not very visible in western society (some people really do it, which is called virtue), or indifference should be a normal phenomenon (if you look at the research on altruistic behavior in western sociology books, you will never mention helping others without compensation).

But in China, due to the influence of Confucianism and moral education, we have a moral standard, that is, people should help others. Now it seems that passers-by should not be indifferent. However, everything that should be overthrown has been overthrown, and what was originally advocated by China culture has been widely criticized as the root of national subjugation. It can be seen that the promotion of China's legal society (which was also the period of breaking capitalism) disrupted the original social order and triggered a series of social problems, which have not been fundamentally solved so far.

For example, in the west, the problem of old-age care is actually more of a national burden. China needs legislation, which is ridiculous in western jurisprudence, because it is the responsibility of the state, but it should be borne by citizens (this is not to say that children should not visit the elderly, but that western countries provide free medical services and social security services for the elderly, while China requires children to pay for these services at their own expense). Then why did China legislate, or why did China think that children should support the elderly since ancient times? This is the influence of Confucian moral education. Because of this series of moral order, China society can maintain a relatively peaceful state. In the early days of the People's Republic of China, these systems were described by extremists as old ideas and severely suppressed. The western system is different from the original system in China on the assumption of human nature, so moving here also has the problem of acclimatization. After long-term research and practice, the country has now begun to advocate the promotion of traditional culture.

Your question is a sociological one, so we should observe it from a sociological point of view. This problem is universal, so the reason must not be confined to individuals. At the same time, because of the contrast, we can find the general reason by considering the differences of social factors that mainly occurred in the last two periods.

P.S. also has a time lag problem of educational influence, that is to say, people who grew up in the old order environment can still maintain the existence of the old order when the old and new orders alternate, but what really changes is actually the next generation. Therefore, in fact, there were no social problems in the early days of the founding of the People's Republic. These problems actually occurred in the next few decades. After that, the popularization of the concept of legal system entered a stable period, but the fundamental problems were not solved and social contradictions still existed.