2. In addition to printing fonts, some fonts can also be written with hard pens (such as those written by hard writing tools such as chalk, pens and pencils) and soft pens (such as those written by soft writing tools such as brush and nylon stylus). All words written by hand with writing tools are called calligraphy. For example, we write according to Yan Zhenqing's copybook, called Yan Ti; According to the words written on Cao Quanbei's copybooks, it is called official script; According to the Preface to Longlan Pavilion, it is called a writing brush running script. These words written by writing tools are all calligraphy. Except here (because Song is a standard print).
3. The fonts you mentioned are commonly used and practiced in people's daily work, which are hard-pen running scripts, usually called ligatures. This kind of calligraphy can be practiced with hard writing tools such as ballpoint pen, signature pen, pen, pencil and chalk. As shown in the figure, write in pencil: