据说因为有谶语说“灭石者陵”，当时石闵改封兰陵公，石虎把兰陵改为武兴郡。
It is said that because there was a slang saying "Lin the Destroyer of Stone", at that time Shi Min’s title was changed to Lanling Gong, and Shihu changed Lanling to Wuxing County.