Solicit opinions extensively: What are the contents and styles of calligraphy works suitable for hanging in the classroom?

Of course, it is better to encourage learning, such as: "learning is like sailing against the current, if you don't advance, you will retreat, and your heart will be calm." "There is a road to diligence in Lushan, and there is no limit to learning the sea." Wait, there are many options. Regular script, running script and official script are also good for calligraphy. The principle is that they are both artistic and easy to identify. It should be artistic under the principle of practicality, because the object is students after all. Moreover, these books are very stable, solid and confident. It is also conducive to encouraging students to study hard. (Qiao Bishan)