The guitar pick is also called plectrum, which is used to playNguyen , Liuqin , guitar and other instruments. It is usually madeof nylon or celluloid. The guitar pick can be used to pluck thestring instead of fingers. Picks originally was made of celluloidand the shape was only triangle. With the maturing of the guitarplaying skills and style features diversified, The paddles ,whether from the production of materials as well as to the shape ofthe structure has a constantly updated and changes, for example,material from the original single "celluloid" has become a plastic,nylon, shellfish armor and even metal, while the shape has changedfrom the original triangle to a peach shape, heart-shaped,cobblestone shape and so on. Picks are the indispensable tool inguitar playing,(In classical guitar playing, picks are not commonlyused.)