Longsun Chitosan biomedical dressing is a perfect wound dressing in clinical care and is a first self-developed production of Hangzhou Qiandao Lake biotechnology Co., Ltd. Basis on the natural bio-materials, chitin, it is designed and produced using innovative biotechnology and biometric technology, which makes the dressing to possess excellent bioactive and biocompatibility. Longsun Chitosan biomedical dressing is widely used to protecting the operative incision and wound, and it is also used to absorb the leakage of operative incision, empyrosis wound and other wound to recover the surface of wound.