I have a pair of Tang Boyong's handwriting, and I'd like to ask all the teachers to appraise it. Thank you.

It's not Tang Boyong, it's Cao Boyong. It seems that the mounting time is not very long. Judging from calligraphy, it was written by him in the middle of the year and the year after. From the point of view of calligraphy, it has a European flavor and good lines. Judging from the seal, it is his own seal. I think it's an original. Judging from the picture, it should be. The price is about 8 thousand to 20 thousand.