In the middle are big characters: Bai Gao Jin Jing.
Bai, there is no record of this person in ancient times. I guess it's a monk who lives in seclusion in the mountains.
It would be a bit far-fetched to insist that it is the "White Sima" Golden Classics. Because the calligrapher's cursive script is really not so good. Of course, when we write, we learn from the past, not from the past. But the word si is not authentic at all; Although the cursive scripts of Ma, Gao and Qi are very similar, people who know a little about calligraphy can still see the difference at a glance. It's really not like a horse. Therefore, my answer is to learn high-quality classics for nothing.