The so-called model is a model, a model, a model and a book. There is not a dragon and phoenix dance. The so-called running script is a bit like regular script, but it is not as neat and rigorous as regular script, so it is much faster to write like this (just like walking, so it is called running script). The first picture is cursive, and the second picture of infinite nothingness is cursive.
Wang Xizhi's Preface to the Lanting Pavilion is used in writing, such as the wavy characters in the first picture. This font is more neat and dignified than Song Huizong's later "gold-repellent style" (also called "gold-repellent style"), but it is not as "chic" as gold-repellent style, and people are emperors.
If you are interested in calligraphy, you can look at the online sub-column "China Chinese Dictionary of Natural History", which contains hundreds of ancient and modern writing methods. Opening books is beneficial, isn't it?