Note that the overall shape of the grass prefix is low on the left and high on the right. In Chinese characters, cursive prefix should not be too wide and too high, but short and vertical. As shown in the above figure, vertical ① and left ② should be retracted, and the distance between them should be appropriate, not too far away and not written together.
The cursive prefix is quite common in the inscriptions of famous ancient calligraphers. You can find out the copy, which is of great help to quickly master the structure and writing of cursive prefix.