The colloquia and celebration for one-year anniversary of Songyang Chamber Of Commerce For Gum Rosin was hold in today in Zhongyue Great Hotel, Songyang, Zhejiang province. Although the production of gum rosin in Songyang is very small, but more than 180 gum rosin factories were hold by manufacturers form Songyang, these factories produced 144.5 thousand tons gum rosin and 25.5 thousand tons turpentine oil in 2004; at present, about 10 thousand tons gum rosin and 4.5 thousand tons turpentine oil were hold by these factories