One-track mind, I don't want to find a way to express myself in any poem.

Don't look back until you reach the south wall, don't cry until you see the coffin, and don't stop until you reach the Yellow River.

Gentleness is a description of people who are paranoid or stubborn, inflexible and inflexible, and do things "all the way black". In a complete sense, people with "one track mind" temperament can not only do bad things, but also achieve good things. Because of persistence and tenacity, it is good to finally achieve the goal of success.

It is a bad thing to miss the chance of success and the fork of success because of rigidity and stubbornness. Therefore, this adjective is ambiguous, both positive and negative, and it is not easy to draw conclusions across the board.