Yu Youren, a great cursive writer in modern times, was a veteran of the Kuomintang and once the president of the National Government Supervision Institute. However, at that time, some "government officials" were well dressed on the surface, but there was no tenderness behind them, and they urinated everywhere, making the house stinking. Mr. Yu had no choice but to write a notice "Don't pee anywhere" and let the secretary stick it on the wall. But it's not. Moreover, his old man never gives up his calligraphy easily, so a good calligrapher must uncover his calligraphy to satisfy his desire. But the calligraphy is beautiful, but the content is difficult to read. Fortunately, this man is very clever. He cut the banner into seven pieces, rearranged the word order, changed it to "small things should not be careless" and asked someone to frame it, which became a rather serious warning motto.