What kind of knife is Sanpassbook?

Sanzhezi is a traditional China cold weapon, also known as "Lian Dao" or "Erlang Dao".

is composed of a long handle and a curved blade. After a special manufacturing process, the tri-passbook has a unique design in shape. It is mainly used in horse fighting and foot fighting, with high lethality. This weapon has been widely used in combat in history, and it has greatly improved the acrobatic performance and attack mode of single knife. When using it, it is necessary to master the corresponding skills to give full play to its advantages.