A cache of bamboo slips and paper fragments found in a former imperial storehouse in Xi'an has revealed the administrative logistics of the Tang Dynasty Lantern Festival. The documents, dating to the 8th century, detail the specific allocations of whale oil for thousands of street lamps, the hiring of acrobats from Central Asia, and the strict security protocols enacted during the multi-day celebrations. This find is being hailed as the 'bureaucratic blueprint' for one of history's most lavish public festivals.
The ledgers also describe the competition between Buddhist and Taoist monasteries to build the tallest 'fire trees'—towering wooden structures adorned with hundreds of lanterns. This discovery moves beyond religious mythology to show the complex economic and civil engineering efforts required to sustain the massive urban heritage of ancient China's capital during festival seasons.