Who invented limerick?

Doggerel, a vulgar poetic style full of interest, is said to be named after China Tang Dynasty writer Zhang Jiangyou. In Qing Dynasty, Zhai Hao quoted Zhang Youyou's snow poem in his popular literature doggerel: "Like a river, there is a black hole in the well. The yellow dog is white and the white dog is swollen. " Later generations called this vulgar, humorous, small and interesting poem "doggerel". In addition, sometimes the author makes poems to laugh at himself, or out of modesty, and also calls his poems "doggerel".