Psychoanalysis theory has long provided an explanation, proving that the amount of mother-child interaction has an impact on children's growth. After all, the mother is the first person to integrate with the child. That kind of security, that kind of warmth, that kind of mother's eyes and that kind of smell are the first love that the child feels. The moment when parents and children are separated is the most disappointing and lonely moment for children. When parents spend a year's labor income to meet their children's material needs, children may hide behind their grandparents, ignore their parents, or even strangers.
I believe many parents are reluctant to leave their children at home. When people can't maintain their basic life, it is inevitable to stay behind, so no matter whether this way of staying behind is feasible or not, there are always some people whose living standards are below average.
If there is no good solution, there is really no way, or let the children follow their parents before going to primary school, and then they can stay when they form their own personality and some of their own opinions. Or keep it with your parents.
The only way to solve this problem is for the government to spend so much tax on people's livelihood projects, so as to shorten the gap between the rich and the poor and ensure people's basic livelihood, so that there will not be so many parents who let their children stay behind for a living and are forced to do so.