Yunlin calligrapher

What is this couplet? The couplet "Ni Yuqing, Shu Yun Green, Mi Lao, Ying Guang, Jin Baoqi" expresses the evaluation of the people and characteristics of the two great calligraphers: Ni Yunlin is pedantic, and Qing Shu is the name of the study, which also means quiet. Yunlin is a name, which also refers to white clouds and bamboo forests. The first couplet means that Ni Zan is pedantic, but he is. The second couplet means that Mi Fei's talent has been vividly reflected in his "Jin Bao Ying Guang Ji".