How many classes are there in the online calligraphy course "Walking freely" in Toby Lin?

Let me tell you something. The whole calligraphy course of Toby Lin (that is, Hu Lin) is divided into four stages, namely, laying a solid foundation of seal script, improving regular script, writing in small letters and walking freely. The study of seal script, official script, regular script, running script and cursive script will be completed in two years, with a total of 60 classes. Now we have registered for the last course "Walking freely", with 20 classes, including learning, appreciation and aesthetics of life.