Take Preface to Lanting Collection, Cold Food Post and Biography of Lian Po and Lin Xiangru as examples (see the figure below). Fill in the missing words directly on the left, between the previous word and the next word, and the size is smaller than the text.
Imitate the new law.
Take some national exhibition works as an example, write the word "mountain" in the signature, such as "Mountain Shades the Day", and write the word "mountain" in the signature;
Another is to engrave the missing words on a small seal, directly between the previous word and the next word (see the picture below).
Tear up the rewritten.