This document is a user manual for a dryer, including troubleshooting and maintenance information. The document introduces the classification criteria of the dryer, such as material thickness, material type, and drying degree. It also provides detailed instructions on operating the dryer, including loading clothes, selecting programs, and starting the drying process. In addition, the document mentions the types of clothes that cannot be dried and precautions, such as checking the fasteners and emptying pockets, and not putting lighters in the laundry. Lastly, the document explains how to clean the cotton lint filter and safety precautions for operation.