The PAPERANG was the first portable student printer to operate completely independent of mobile phones. With the support of OCR technology, users can take photos, search for information on the Internet, and use the device's image-text analysis system. The device provides students with a variety of learning functions, bringing them a more natural and immersive learning experience. In addition, the use of grayscale thermal technology to print exercises can be pasted on exercise books to improve learning efficiency. The PAPERANG is small and portable, can be used anytime, anywhere, and can be studied at any time of the day or night.