How to write "1": from the upper right corner to the lower left corner. (straight man).
The writing method of "2": touch the line on the left from the pen, then touch the line up to the right, slightly form a semicircle, diagonally to the lower left corner and touch the line horizontally. (upper left center-upper center-upper right center "circle"-lower left corner "straight"-lower right corner "flat").
How to write "3": Start without touching the line and touch the line upward. Don't touch the line to the right, form a semicircle slightly (smaller than the semicircle at the upper end of 2), then go to the middle, stop above the dotted line, turn to the lower right to touch the line, touch the line down and bend to the left to touch the line. There is more than half a circle up and down, but the bottom is bigger than the top. (The upper part is the same as 2, upper left middle-upper middle-upper right middle-transverse midline-lower right middle-lower left middle).
How to write "4": Draw a diagonal line to the left from the middle of the upper line to the lower grid 1/3, and then cross it after touching the left line and touching the right line. The second stroke goes straight down from the top right without touching the right line, but touching the bottom line below. . (up, down, left, middle, up, right, middle, upper corner, lower middle).