What do you mean by three years of darkness?

Show weakness in the open and fight back in the dark. Eliminating evils for three years is to show weakness and fight back by stealth. Eliminating evils means eliminating evil forces. As a huge cancer of a harmonious society, the underworld not only does great harm to people's lives and property, but also affects the prosperity and stability of the whole society. People gnash their teeth and hate their guts. Various localities have launched special struggles to eliminate evils, and the society has been at peace.