Songjiang, China

With a population of over 1.9 million, Songjiang is no sleepy suburban enclave. The Songjiang Mosque, the oldest in Shanghai, dates back to the 14th century, but this city's rapid development has brought a mixed bag for would-be expats. While the mosque's elegant Hui architecture is a draw, the bureaucracy to navigate as a foreigner is a persistent headache. And with the metro station a mere stone's throw away, the city's transportation links are undoubtedly convenient. Overall, Songjiang's blend of historic charm and modern infrastructure may appeal to seasoned China hands, but newcomers should brace for a steep learning curve.