Choose a word based on your name, with the same or opposite meaning. For example, Su Shi, also known as Zizhan. Shi is the name, which means holding the railing in front of the car, and the character is Zizhan, which means looking far away. In ancient times, people could hold the railing in the car and see far away, which is the same. Han Yu, the word tuizhi, Yu is the name, which means to advance, and tuizhi is the word, which means retreat, which is the opposite.
There are also people who choose their own characters to express their personal will. For example, Guo Jia’s courtesy name was Fengxiao. His coming-of-age ceremony coincided with the stage of observing filial piety after the death of his mother, so he chose the character Fengxiao.