Writing a preface is a common practice in calligraphy collections, but whether you need to write a preface depends on your personal situation and purpose. The following are some factors to consider:
1. Purpose: If your calligraphy portfolio is to show your calligraphy skills or to show your work to others, then writing a preface can allow viewers to better understand Understand the context and intent of your creation to better appreciate your work.
2. Theme: If your calligraphy portfolio has a clear theme and connotation, writing a preface can better explain and elaborate on these contents, allowing viewers to better understand and appreciate your works.