YZ is a natural resin modified resin, a new species, which is characterized by antioxidant properties, and acid prices, molecular polarity, adhesion performance. Dicarboxylic acid can be a substitute for organic synthesis. Widely used in adhesives, inks, paints and other industries, can also be used for paper sizing agent and rubber processing. Effect of its use is much higher than 138, and other rosin modified resin, the equivalent of terpene resin.