Scholarly night rain, peach and plum for ten years
The first part praised your calligraphy achievements, and the second part said that you practiced hard and continued to encourage.
Writing should be bold and eclectic, just like dancing a sword, but it also needs to be true and strive for perfection, just like tuning the piano. Calligraphy pays attention to black and white layout, black is a word, and white is also a word. Looking at the meaning of ink from flying white, calligraphy has a climate.
As an art, calligraphy is inseparable from culture, and the artistic conception of calligraphy is the state of mind of cultural personality. It took ten years to get a glimpse of the true meaning of books, be edified by books and be infiltrated by the rain at night.
Note that peaches and plums refer to your Excellency, and ten refers to empty posts. According to your own age of practicing calligraphy, say seven years, change ten into seven. Create it yourself and correct me if you are not satisfied.
Note: Because I don't know if there is any length requirement for the inscription, I wrote a clause couplet. If there is no word limit, I will write a complete couplet. If the number of words is small, I can divide it into "Rain in the Night with Scholar/Heart with Sword" or "Ten Years' Peeping Files of Feibai Sanfen Hidden Ink Peach and Plum". But personally, I think that "scholarly night rain/courage" is too general and vague.