Looking for ancient calligraphy font, I saw it in the copybook. The most obvious feature of this font is that the folding of Chinese characters is round. Thank you.

If you see the thin gold body and this regular script at the same time, the turning point is round. Could it be the calligraphy collection of emperors in previous dynasties? Otherwise, I can't think of anything else that might put round regular script and thin gold body together. Kangxi Yongzheng Qianlong's words are all regular script, and the turning points are all round, or perhaps it is the "Jiu Si" of Ming Sizong. Baidu search "emperor calligraphy" has, see if it is.