Zaozhuang, China

With a population of 3,855,601, Zaozhuang is a sprawling industrial hub in southern Shandong. The city's coal-mining roots have left a mixed legacy - the economy is stable, but bureaucracy is a persistent headache. Winters are brutally cold and dry, while summers are oppressively hot and humid. On the plus side, Zaozhuang boasts a rich canal culture and a growing lithium battery industry. Overall, this gritty city may appeal to those seeking affordable living and a taste of industrial China, but the trade-offs are not for the faint of heart.