Calligraphy sentence, this poem

Of course, unofficial history refers to the scholar's unofficial history. Here refers to strange, Yan Zhenqing regular script steady, Mi Fei was accused of madness, so it is called "Mi Fei epilepsy". He, Huai Su and Zhang Xu are all representatives of weeds in different periods in China. Borrowing Mi Fei in the poem means that calligraphy and painting are stable regardless of merit and should be eclectic. Whether it was written by Ni Yunlin depends on the age of the work.