1. First, prepare corresponding patches according to the style and content of calligraphy works.

2. Then, in the prepared patch, choose a word, word, sentence or paragraph that is consistent with or similar to the original product.

3. Then determine the location of the patch according to the original layout and overall style.

4. Then paste the patch to the corresponding position of the original work, and pay attention to keep the work flat without leaving any paste marks.

5. Then, improve the patch to integrate it with the original, which includes modifying, adjusting and beautifying the patch.

6. After the patch is finally repaired, it can be signed and sealed to prove the authenticity and legality of the patch.