Why can't I drag this brush on rice paper! How can we be smooth and not leak ink?

There are two possibilities for the appearance of ink. 1) There is too much water in the pen. The solution is to put less water, but you said that ink is too thick to dry easily. There is a degree problem, as long as you don't go to extremes. 2) The writing speed is too slow. The solution is to speed up writing. It has nothing to do with the size of the pen you analyzed and the oily smoke ink. It is correct to write calligraphy with raw rice paper, and it is common to write small characters with big characters, no problem. With more practice, you will master the characteristics of brush and Xuan paper, and you will also master the speed of writing.