The thread between painting and calligraphy is very clear. Northern Song Dynasty rubbings in the Palace Museum in Beijing.
The southern song dynasty rubbings, 15 lines of "chisel" are intact.
Song Tuo's "Tang Yan Zhen Qing Shu Duo Ta Bei" photocopied by Cultural Relics Publishing House.
Peking University Library collects exquisite rubbings of ancient stone carvings, which was fully expanded in the middle of Ming Dynasty.
In the late Ming and early Qing dynasties, the collection of Xi forest of steles and famous inscriptions was expanded.