The timeless articles of the four great writers. -Anonymous wrote useful couplets for Su's ancestral temple.
The couplet called "Su San" both an essayist and a poet. The word "father and son" refers to Su Shi's Meishan Susan Temple, namely Su Xun, Su Shi and Su Zhe.
The four great figures in the bottom allied league refer to: North Korea, Liu, Europe and the Soviet Union. (Han Yu and Liu Zongyuan in Tang Dynasty, Ouyang Xiu and Su Shi in Northern Song Dynasty)