Clinical Study of Kangfuxin and Basic Fibroblast Growth Factor in Promoting the Healing of Donor Site

Inclusion Criteria: * Male / female patients aged 20-50; * Burn area ≤ 30% TBSA; * Patients who need auto skin grafting due to burns or skin defects due to trauma; * The donor area is 100cm2, and the thickness of skin is 0.25mm (Split thickness skin donor site group)/0.40mm (Medium thickness skin donor site group). The donor site is the body part with similar skin color and sufficient skin area (except scalp); * Not involved in clinical trials of other drugs; * Subjects who have agreed to participate in the clinical study and signed the informed consent. Exclusion Criteria: * Subjects who were previously allergic to similar products or related components of test products; * Subjects with other systemic or local skin diseases that may affect wound evaluation; * Subjects with significant organ dysfunction / failure or other serious diseases, including clinical related cardiovascular disease or myocardial infarction within 12 months before enrollment; malignant tumor; serious neurological or psychiatric history; serious infection; active disseminated intravascular coagulation; * Subjects with moderate malnutrition (BMI \< 17kg / m2) and severe anemia (HB \< 60g / L); * Subjects proposed to use immunosuppressant, steroid hormone, epidermal growth factor and other drugs that may affect the wound healing of the donor skin within 3 months before admission or during the study period; * Participated in clinical trials of any other drugs or medical devices within 3 months; * History of major diseases that may affect general physical condition and other patients who are not considered by the researchers to be eligible for this study.