heziqun
Heziqun is easily mistaken for qixiong ruqun, but a distinct feature of heziqun if the waistline, which ends below the bust, while qixiong ruqun has a waistline that begins above the bust.
Heziqun always features a hezi, qixiong ruqun can be worn with or without the sash. Hezi can be worn with many hanfu styles, all of them are not heziqun.
Heziqun is often worn with a daxiushan.