In the Shanghai Glass Museum, there is a special exhibit, that is the artist Yu Lu for the birth of his daughter, the "Angel in Waiting". It was a beautiful butterfly, made of countless glass tubes, which took the artist two years and three months to complete, like another child of the artist. This beautiful butterfly, flickering under the lights, attracted the eyes of countless viewers. One day, however, a cruel hand destroyed her and she became a mournful butterfly with broken wings. There may be more than one artifact of artificial destruction in museums, but it is rare to display it with texts attached. The treasures that have been destroyed are deplorable, and such warnings often have more shocking powers.