Explain the question, what is "supporting things to express their will"?

"Expressing one's will through supporting things" refers to entrusting and conveying the author's feelings, aspirations and interests through the description of objective things. For example, in Yu Qian's poem Ode to Lime, the poet expressed his firm sentiment and upright and noble thoughts through the process and result of mining stones and burning them into lime. Another example is Praise of Poplar, Style of Pine Tree, The Story of Sick Plum Restaurant, etc. , are examples of the good use of this skill.