Rosin is a natural resin derived from renewable pine forest resources – the oleoresin of pine trees. Chemically, it is a solution of resin acids dissolved in terpenes. Through processing, rosin (mainly composed of resin acids) and turpentine (mainly composed of terpenes) can be extracted. Gum rosin refers to that which is collected by tapping pine trees and then refined, characterized by the ability for continuous tapping from the same tree, promoting resource utilization. China boasts abundant pine oleoresin resources and is the world's largest producer of gum resin.