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Famous saying explanation

A person's role, for the revolutionary cause, is like a screw on the machine. Because of the connection and fixation of many screws, the machine has become a solid whole, and it can run freely and exert its great working ability. Although the screw is small, its function is immeasurable. I am willing to be a screw forever. Screws should be maintained and cleaned frequently to avoid rusting. The same is true of people's minds, so we should check them frequently to avoid making mistakes.

"Screw spirit" is the spirit that individuals consciously integrate into the book cause of the Party and the people, obey the whole, obey the organization, be loyal to their duties, be conscientious, love the frontline and serve the people wholeheartedly.