This is a hint to Zhang Shangying's cursive script.
The allusions found are as follows:
Zhang, the prime minister, is careless and good at cursive writing. At that time, everyone laughed at it. The prime minister is calm. A word a day, a pen and a book, full of paper dragons and snakes flying. Let my nephew record it. My nephew turned a deaf ear when the waves were dangerous. He took the book and asked, "What is this word?" The prime minister has been familiar with it for a long time, and he doesn't know it himself. He scolded his nephew and said, "If you hadn't asked earlier, I would have forgotten."
The general idea is:
Prime Minister Zhang likes to write cursive script (cursive script), but he is very scribbled. People laughed at him, but he didn't think so. Once, he suddenly got a good sentence and asked for a pen and ink. The handwriting was scrawled and covered the whole paper. He immediately asked his nephew to copy the poem. My nephew copied a strange pen and was puzzled. He stopped writing and asked the Prime Minister what Zhang was reading. After careful identification for a long time, Prime Minister Zhang didn't recognize what he wrote, so he scolded his nephew and said, "Why didn't you ask me earlier? Now I forgot. "