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Back during the Soong dynasty when the Chinese were oppressed by the Mongols, their rebel leaders sought to overthrow the Mongol overlords.
As meetings were banned it was impossible to make plans. Liu Fu Tong of the Anhui Province came up with a plan by requesting permission to distribute cakes to his friends to bless the longevity of the Mongol emperor. He made thousands of cakes shaped like the moon and stuffed with sweet fillings.
Inside each cake however was placed a piece of paper with the message: ‘Rise against the Tartars on the 15th day of the 8th Moon’. Reading the message, the people rose against
the Mongols on a local scale.
This rebellion enabled Chu Hung Wu, another rebel leader to eventually overthrow the Mongols. In 1368, he established the Ming dynasty and ruled under the name of Emperor Tai Tsu.
Henceforth, the Mid Autmn Festival was celebrated with mooncakes on a national level.