What is the last star of calligraphy works?

That is, the writer's name, year, month, corridor number, etc. Besides writing this article. The final inscription method of calligraphy and calligraphy works, also known as inscription, is to write the author's name, year, month and Xuan number in addition to the writing method of this article. Before the Tang Dynasty, many writers didn't ask questions, so it was very troublesome to study ancient works, which became a lot of forgeries, so many works by Wang Youjun, a great scholar, were suspicious. In addition to font and font changes, models can also be divided into single models and double models.