Mobile phones and computers have become an indispensable part of our lives. We obtain information, entertainment, and work through them every day, and they are like windows to the outside world. However, these screens are also exceptionally fragile and susceptible to scratches, impacts, and other injuries. Fortunately, there is a group of unknown guardians - screen protectors - who silently guard these precious screens under the fingertips of users, witnessing every wonderful moment.