Drying oven is a commonly used equipment in biology teaching and laboratory, used to dry samples under controlled temperature and humidity conditions. It is usually made of metal or plastic and equipped with heating elements and fans inside to ensure even temperature distribution inside the box. The door of the drying oven is usually equipped with an observation window, which facilitates the observation of the status of the samples inside the oven. In biology teaching, a drying oven can be used to dry plant specimens, remove moisture from samples, and so on. By using a drying oven, students can learn the basic techniques of sample preparation, understand the effects of temperature and humidity on sample preservation, and learn how to operate laboratory equipment correctly.