Mangshi, China

With a population of 439,931, Mangshi is a bustling county-level city in western Yunnan, but it's not for the faint of heart. The bureaucracy is a persistent headache, and the climate can be oppressive. Still, the city's strategic location on the China-Myanmar border means it's a hub for trade - if you can navigate the red tape.

Mangshi's history as a former stronghold in the China-Burma-India theater during World War II, and its role as the site of the 1956 Sino-Burmese Border People Friendship Celebratory Conference, have made it an important regional center. Today, the city's economy relies heavily on border trade, though its agricultural products like coffee and macadamia nuts also contribute.

Overall, Mangshi is a pragmatic choice for those seeking commercial opportunities in China's southwest, but the challenges of living there shouldn't be underestimated. This is a city for the thick-skinned entrepreneur, not the casual tourist.