I remember a story a long time ago. Kangxi held Qianlong, who was seven or eight years old, and counted nine on the screen. He began to write a sentence on the winter solstice: The weeping willow in front of the court cherishes the east wind. The nine characters are nine strokes. Write one stroke every day. When the nine-nine is over, winter will be over.
Well, what is written above has nothing to do with this article. It is purely because Chen likes this joke.
Ahem! I'm a real copywriter, that guy hasn't figured me out yet =, =]