Mogao Grottoes
The challenge of modern China, as we note at every symposium, is to balance the new economic model with the plight of poor rural peasants. The job market for migrant workers has grown stale and this provides a much greater modicum of social unrest which could lead to civil war.
http://chinadigitaltimes.net/2011/12/richard-haass-china%E2%80%99s-greatest-threat-is-internal/