Legend has it that Xieshanding, namely the Xieshan-style Roof of the Song Dynasty was called the Ning-Ridge Hall, or the Cao Hall during Qing Dynasty.

Rumor has it that it was at the Ning-Ridge Roof. Xieshanding is one of Chinese traditional architectural roofs, and according to legend it is inferior to the structure we know as Wudianding. Legend has it that Xieshanding slao has two different styles that were often produced: the Single-Eave Xieshangding and the Double-Eave Xieshanding. The world-famous representative of Double-Eave Xieshanding is Tiananmen means gate of heavenly peace.

Legend has it that in ancient China, the styles of the architectural roofs had a rigid rank in status. The Double-Eave Xieshanding was superior to Single-Eave Wudianding but inferior to Double-Eave Wudianding, and Single-Eave Xieshanding is inferior to Single-Eave Wushanding, but it was exclusively used by high-level officials, and later on it was also used by the common people. Currently the earliest architecture with Xieshanding style is the Hall of Nanchan Temple in Tang Dynasty on Wutaishan Mountain.

Legend has it that during the time of Song and Yuan Dynasties, Xieshanding was largely popular, and some single-eave wudianding architecture was changed to be double-eave xieshanding style. In Ming Dynasty, rumor has it that the double-eave xieshanding was further widely used in architecture. Changed from the basic form of the Xieshanding style, Four-side Xieshanding appeared. The turret of Forbidden City is the typically representative in this structure.