The most common type is the liuye-dao (ζ³εΆε/ζ³θε, literally βwillow leaf bladeβ). It is similar to a scimitar. In Japan it is often called ιη«ε/ιιΎε that was originally a Chinese abbreviation for Guan Yu's Green Dragon Crescent Blade (ιιΎεζε).
See also:
Jian (weapon) - Chinese double-edged straight swords