After reading this answer and practicing a little, I can't guarantee that everyone's composition will improve to a higher level immediately, but I believe at least there will be no more cases of racking their brains and running out of ink in order to use the material. It is definitely not a problem to practice more and improve a score in composition.
These six materials are: people, country, affairs, current affairs, literature and art, and science. The material of the program never needs to blindly pursue those strange and difficult materials. The excavated material is not raiders of the lost ark, nor grave robbery notes. You don't need to climb mountains and mountains, just have a pair of bright eyes, find suitable materials in the fields that you and I are familiar with, or explore the unknown side of the fields that everyone is familiar with. Dare to use, be good at using these very natural and friendly materials, in order to write an argumentative essay with high X-grid.