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Global history is written with tea as the core. Tea built an empire on which the sun never sets and carries the grand narrative of hundreds of years of globalized trade in the modern world.

"Energy is the only universal currency." From the ancient gathering society to the fossil energy era, the panoramic view shows the intertwined history of energy utilization and civilization evolution.

"Energy is the only universal currency", using energy as a yardstick, a cultured and precise analysis of the evolution of human society.