What does the sharp slowdown in population growth in many cities mean?

The cliff-like slowdown in population growth in many cities can explain the following situations:

1. Population growth has entered a bottleneck period. The urbanization process has advanced rapidly in the past few decades, but the degree of urbanization is already very high. Population growth has begun to be limited by environmental, resource and other factors, and the urban population growth rate has begun to slow down.

2. The population of young adults is declining. Due to China's separate two-child policy, the number of births is getting smaller and smaller, and the young and middle-aged population is one of the main sources of urban population growth. The decline in number will also affect the growth rate of urban population.

3. Economic development slows down. Urban population growth is closely related to economic development. If economic development slows down, it will affect the rate of population inflow into the city, resulting in a slowdown in population growth.

In general, the sharp slowdown in population growth in many cities reflects the new situation of China’s economic development and social changes, which needs to be addressed through the formulation of scientific urbanization planning and population policies.