In ancient China, the names Gong, Shang, Jiao, Zheng, Yu, Bian Gong, and Bian Zheng were called seven sounds, and the seven kills used one sound as one kill, and each step was a killing move. Every killing must be supplemented by a palace tune. The killer is like a flying swallow dancing on the palm of his hand, so beautiful and elegant that it makes people look forward to it. As soon as the seven kills came out, no blood was seen, the throat was sealed, and there was no one alive.