20 17 calligraphy inscription

Calligraphy can write the next paragraph, or it can only write the next paragraph. The format of the next paragraph is,

Time (usually not Gregorian calendar)+(%location)+author+(respect) book

Such as: "B is not in the spring (the next Huan) in the ancient style hall XX to honor the book."

In traditional calligraphy, dates are marked by years, and months are marked by lunar calendar, not specific to a certain day.

20 17 is Ding Younian.