Ancient Bell

After her mother died of illness, Gu Ling discovered an interesting thing while packing up her belongings. It looked like a copper bell. It had begun to rust on the surface and had strange patterns on its surface. Can't see what it's for. When it was presented to his father, he couldn't figure out the history of this bell. "I guess you must be older than me," the ancient bell rang, and he put it into his bag. Gradually, he forgot about it... A strange thing happened late one night. There was a crashing sound outside the window. It felt very distant, but yet so clear...