Authentication 辨伪指南 Step-by-step methods to identify genuine Chinese stamps and detect forgeries. Covers watermarks, perforations, paper types, and security features. Read Guide → | Preservation 保存方法 Proper storage techniques, humidity control, album selection, and handling methods to maintain stamps in pristine condition for generations. Read Guide → | Grading Standards 评级标准 Understanding stamp condition grades from Mint to Used. Learn how centering, perforations, gum, and color affect value. Read Guide → |