1. Sansu refers to the Northern Song Dynasty essayists Su Xun, Su Shi and Su Che. Su Xun's representative works are: "Theory of the Six Kingdoms", "The Art of Mind", "Several Strategies", "The Book of Power", "The Theory of Distinguishing Adultery", "The Theory of Heng" and "The Theory of the Six Classics"
2 , Su Shi's representative works are: "Night Tour of Chengtian Temple", "Seven Collections of Dongpo", etc., and lyrics include "Shui Diao Ge Tou. When will the bright moon appear", "Nian Nujiao", "Red Cliff Ode", etc. His calligraphy works include "Articles of Appreciation to Civil Teachers", "Ji Daowen of Memorials to Huang", "Ode to the Former Chibi", "Poems of Huangzhou Cold Food", etc. His paintings include "Pictures of Dead Trees and Strange Rocks", "Pictures of Bamboos and Stones", etc.
3. Su Che’s representative works are: "Huangzhou Kuaizai Pavilion", "A Letter to Privy Councilor Han Taiwei", "Chaogu Biography", and "Luancheng Collection", including "The Later Collection" and "Three Collections". Collection", Volume 84. etc.
4. Sansu refers to the Northern Song Dynasty essayist Su Xun (alias Laoquan, courtesy name Mingyun) and his sons Su Shi (alias Zizhan, courtesy name Dongpo Jushi, known to the world as Su Dongpo), Su Che (alias Su Dongpo) Ziyou, named Yingbin Yilao (1039~1112). In the early Jiading years of Emperor Renzong of the Song Dynasty, Su Xun, Su Shi, Su Zhe and his son all arrived in Tokyo (today's Kaifeng City, Henan Province). Due to Ouyang Xiu's appreciation and praise, their articles quickly became famous all over the world. Scholars and officials rushed to pass on and recite it, and for a while scholars competed to imitate it.