Typical examples are Preface to Lanting and many letters from Zhao Mengfu. Taking horizontal painting as an example, the horizontal painting of many characters in Preface to the Lanting Pavilion looks like an arc, and the end of the arc is a top. Or there is no arc at all, and the place where the pen starts is the sharp point. After the pen tip falls on the paper, it does not move to the left, but moves directly to the right. Some words in Zhao Mengfu's letters are square and have no sharp strokes, but the essence is that the pen tip is spread out to the right conveniently, and the pen tip is dragged to the right without hiding the front. This exposure makes the lines of the pen look sharp, and the strokes are divided into yin and yang, so the strokes are like bamboo leaves, as if they were fluttering with the wind and picturesque. I haven't heard of the Feng you mentioned, so I dare not say it, but after searching online, there is a saying that it was written with a pen downwind, also called the wind, and the exact source is not clear. for reference only