Earlier quoted context omitted.
Recently went to Xian which locals had described to be as being more of a small village feel. A mere 8m population.
Xian at least has thousands of years of history. On the bullet train in China you’ll often pass by cities of millions of people which might have been mere hamlets a generation or two ago. The size of China, its economic renaissance and the fact that good jobs in China are almost exclusively found in urban areas has led to a vast migration towards city centers which is pretty much unprecedented in human history.
Additionally, their economic rise has contributed to higher wages and hence a relatively weaker position in the price sensitive globalized labor force, and they are beginning to lose out to more competitive countries like Vietnam, Thailand, and India. Since exports make up such a fractionally large portion of their GDP, this is another hazard.