Dao sword

Dao swords were Chinese swords with curved blades.

In 1807, the Thirteenth Doctor, Yasmin Khan, Dan Lewis, Zheng Yi Sao and Sin Ji-Hun used dao swords to fight the Sea Devils led by a chief. (TV: Legend of the Sea Devils)

Chinese magician Li H'sen Chang used a dao sword to threaten Mr Sin in his act at the Palace Theatre. (TV: The Talons of Weng-Chiang)