Although most rural couples in China have more than two children, almost all young people are moving to cities to work. Therefore, young and highly qualified immigrants will continue to hedge against the aging population in big cities, making the population relatively declining or flat, and the vitality of big cities will be maintained. In some places, the elderly are already supporting the countryside, and may even become the norm. Rural Japan is a cautionary tale.
Which of the following does the text say?
Rural areas may age earlier than metropolises.