Heading further west across China, the prevalence of prostitution is inescapable. For many young women, it's the only way to make a living in the impoverished center of the country. With the arrival of capitalism, many state-owned enterprises vanished, taking jobs with them.
But with the erosion of communist influence there also is an explosion in religion, and many small Christian churches can be found along Route 312.
In the third of seven reports on his 3,000-mile journey across China, NPR's Rob Gifford reports on the resurgence of prostitution -- and religion -- in the world's most populous nation.
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