Ganzhou, China

This industrial hub in southern China has a population of over 8.9 million, with a metro area of nearly 2.6 million. While Ganzhou boasts impressive economic growth, with a GDP per capita of over ¥35,000, the relentless summer heat and heavy bureaucracy are persistent headaches. Surrounded by lush mountains, the city promotes itself as the "Orange Capital of the World," but the gloomy, rainy spring and frequent cold snaps of winter can make daily life a challenge. Overall, Ganzhou may appeal to those seeking economic opportunity, but the subtropical climate and persistent red tape could quickly wear on the uninitiated.