The Xiaodao Lun is an anti-Daoist polemic written in 570 for the Emperor Wu of Northern Zhou (543–578) by the Buddhist courtier Zhen Luan. After holding several inconclusive debates in the court, Emperor Wu commissioned the Xiaodao Lun as one of two reports examining the suitability of sponsoring either Buddhism or Daoism as a state religion for the Northern Zhou dynasty, with a view towards unifying China. The Xiaodao Lun mocked Daoist practices, accused Daoists of plagiarizing Buddhist texts, and portrayed the religion as dangerous to social stability. Its advice was disregarded by the Emperor, who supported the preservation of Daoism, but his dynasty was ultimately short-lived. Zhen Luan's Xiaodao Lun is preserved in the Chinese Buddhist canon in fascicle 9 of T2103 and is consulted for its quotations of Daoist texts that have not been preserved until today.