Diligence refers to hard work and efforts to produce material and spiritual wealth. Diligence is a traditional Chinese virtue, from the book Jin Tencher: \"In the past, the king was a hard-working man. Diligence is usually used as a positive term.
It means hard work.
make sentences
He is so diligent that he can hardly keep himself idle for a while.
Many projects fail because requirements change, and project managers need to be diligent and need to guard against it.