The back pressure is a long point, just pay attention to its direction.
Oblique, generally write at a 45-degree angle to the right. When you get to the position, you can go to the right and raise your pen to make a front. Be careful that the front length is not too long.
Pingsi is the most complicated one, and it needs to write tortuous effects.
The basic stroke is: stroke to the lower right after a quarter turn, and stroke forward while walking to the upper right after reaching the position. Similarly, the forward stroke should not be too long.