Jian

The ''jian'' (Mandarin Chinese: , , English approximation: , Cantonese: ) is a double-edged straight sword used during the last 2,500 years in China. The first Chinese sources that mention the ''jian'' date to the 7th century BCE, during the Spring and Autumn period; one of the earliest specimens being the Sword of Goujian. Historical one-handed versions have blades varying from in length. The weight of an average sword of blade-length would be in a range of approximately 700 to 900 grams (1.5 to 2 pounds). There are also larger two-handed versions used for training by many styles of Chinese martial arts.

Professional ''jian'' practitioners are referred to as ''jianke'' ( or "swordsmen"; a term dating from the Han dynasty).

In Chinese folklore, it is known as "The Gentleman of Weapons" and is considered one of the four major weapons, along with the ''gun'' (staff), ''qiang'' (spear), and the ''dao'' (sabre). These swords are also sometimes referred to as ''taijijian'' or "tai chi swords", reflecting their current use as training weapons for tai chi practitioners, though there were no historical jian types created specifically for tai chi. Provided by Wikipedia