Yu Mingcheng's Investigation of the Non-Poisonous Sting

It's another rainy night. A man slowly walked into the study. He smiled as he looked at the rows and rows of gold-rimmed tomes on his bookshelf. Then he leaned back and fell. Another man was standing on the rooftop opposite. Seeing all this, he smiled, then turned and left. In a high-end community, as the sun set, a man slowly fell down. The murderer disappeared.