Changshu, China

With a population of 1,677,050, Changshu is no quaint backwater. This industrial powerhouse boasts a thriving textile and paper-making sector, drawing over $15 billion in foreign investment. But don't expect a smooth ride - the bureaucracy is a persistent headache, and the city has a long history of fending off Japanese pirate attacks. While Changshu's mild climate and agricultural roots make it a productive hub, those seeking a quiet, low-stress life should look elsewhere.