A Textual Research into the Files of Zheng He's Voyages to the Western Seas: Were the Files Burnt by Liu Daxia

Zheng He's Voyages to the Western Seas were significant events in the voyages of the world. Researches into the events are practical parts of the mission to promote the Chinese culture. However, the past researches of about 100 years have encountered one big issue: the files of Zheng He's Voyages to the Western Seas were burnt by Liu Daxia. This research concludes that they were not. Liu burnt the files of campaigning the Annamese.