Rapid Desert Formation May Have Destroyed China's First Kingdom

correlating climate changes and the history of rising/falling civilizations is pretty fascinating, like Roman Empire - 2000 years ago Mediterranean being comfortable for grain growth with drying out half-thousand years later with parallel warming out of the middle of Europe making it much more comfortable for agriculture, the heating peak of 1000 years ago in Mediterranean and Caliphates taking the whole region over and pushing back the Caliphates by Europeans with cooling down into the Middle Ages, Viking Age is basically the result of peak warming climate the same like Caliphates, Mongol Empire when grassy steppes with water for horses, yet without massive forests, formed across the whole Eurasia...

Weren't they a 'water empire'? Did they create the desert? Then it could be considered a failed policy that brought them down.