This is a Jiu Zhen (九针) display set, representing the nine classical acupuncture tools described in the Huangdi Neijing (Yellow Emperor's Inner Classic). 

These tools are categorized by their specific therapeutic uses in traditional Chinese medicine:

The Nine Needles

• Chan Zhen (镵针): Arrow-headed needle for superficial pricking to drain heat or bloodletting.
• Yuan Zhen (圆针): Round-tipped needle used for massage or pressing meridians without piercing the skin.
• Ti Zhen (鍉针): Blunt-tipped, grain-shaped needle for pressing specific points.
• Feng Zhen (锋针): Three-edged needle for bloodletting to treat acute diseases.
• Pi Zhen (铍针): Sword-shaped needle used for draining abscesses or pus.
• Yuanli Zhen (员利针): Needle with a sharp tip and cylindrical body for deep stabbing to treat acute pain.
• Hao Zhen (毫针): Fine, thin needle used for general acupuncture therapy.
• Chang Zhen (长针): Long needle for deep insertion into large muscles.
• Da Zhen (大针): Large needle used for draining fluids or edema. 

This framed set is often used as a teaching aid, display piece, or decorative item.