Why are families in Northeast China basically "one child per family" and unwilling to have a second child?

I have a good say in this question, because I am from the northeast, and there is only one girl in my family who doesn't intend to have another child. In fact, for most Northeasters who only want one baby, there are two main ideas. 1 is economic pressure, and the second is the difference in values.

The problem of treating children in the south and the north is very different. Of course, there are also second children in the north, but most people don't want to have a second child, especially after 80 s and 90 s. They grew up as only children themselves, so they can get used to and accept the fact that there is only one child at home. From my personal point of view, the main reason for having children is that the family conditions are not very good, so if I want to have another child, my plan will be disrupted and my whole life will be disrupted.

For example, I got married at the age of 28 or 25, my children are still young, my mortgage has to be paid for many years, and my salary is not very high. There is also a car at home, and my wife and I can't lose our jobs, so we can barely maintain a family of three.

If one day we have a second child, the pace of life will suddenly be disrupted, the economy will make ends meet, and the wife may have to stop working for several years to take care of the children. Who will fill the gap in this part of the expenditure? We can't go back to eat old people after we get married. Although the parents' opinion is to help us look after the children and support us to have another child, we are determined not to.

Another reason is that we feel that life is very short, just a few decades. Wouldn't it be nice to train our children as early as possible and then leave some time for sightseeing?

If we have another child, I'm afraid 10, we won't live a free life for eight years, so we have our own ideas about the second child, and we want to spend more time living for ourselves. As for children, having one is enough, which proves that we have the ability to have children and are worthy of our family and social responsibilities. This is possible.