Sān Sū
the Three Su father and sons
refers to northern Song literati Su Xun 蘇洵|苏洵, Su Shi 蘇軾|苏轼 and Su Zhe 蘇轍|苏辙
Táng chū Sì Dà jiā
Four Great Poets of early Tang
refers to Yu Shi'nan 虞世南[Yu2 Shi4 nan2], Ouyang Xun 陽歐詢|欧阳询[Ou1 yang2 Xun2], Chu Suiliang 楮遂良[Chu3 Sui4 liang2] and Xue Ji 薛稷[Xue1 Ji4]