If you study sacrificial tablets, you can pay attention to a little change in the treatment of ink. Generally, when writing Fang Bi, the ink should be moist but not greasy. Pay attention to the relationship between lines: thick lines occupy a more important position and are the main pen of the whole word, with more concentrated strength and heavier pen and ink; The thin line is in the auxiliary position, and the ink color is light. If we want to write a line of Fang Bi's paper while studying, and the pen is out of ink at this time, we might as well copy this line with a round pen. Although as a copy of this line, it lost its original appearance due to the change of pen, but from the inscription to the ink book, the whole word has been supplemented by the loss of this shape, which is not contradictory to the so-called principle of "taking the spirit by shape" in calligraphy. To study the memorial tablet, we should first focus on the organic whole composed of thick and thin lines and maintain the strength of the text.