What are the artistic features of cursive thousand-character writing in calligraphy?

The cursive script was written in Xuanhe Renyin (1 122)4 1 year. This piece of paper is a mud Un-yong Kim notebook, 1 1 meter long, with momentum in one go, flying brush strokes, vigorous and smooth, a bit like Huai Su's style with a little grass from time to time, so the implication changes ups and downs, the brushwork is more varied than weeds, and the composition also strives to make the interlude smooth, which is really a proud pen.