In the Sung period, emperors, such as Shinso and Kiso protected Dokyo, and as the subjects of Naitanjutsu (内丹術) and Rendo (錬度) were studied by many people, Dokyo underwent a drastic transformation.
宋代には真宗(宋)や徽宗といった皇帝が道教を保護し、内丹術（ないたんじゅつ）や錬度（れんど）の科目が盛行し道教の姿も大きく変化していった。