1. History of the Song Dynasty, twentieth of the 24 dynastic histories 二十四史 (ÈrshísìShǐ), composed under Toktoghan 脱脱 (Tuōtuō) in 1345 during the Yuan Dynasty 元 (Yuán), 496 scrolls

2. (not to be confused with 宋书 (Sòngshū))