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Three provinces are diligent every day, and four things are known at night.
This is very simple

Three provinces: First, did I do what others asked me to do wholeheartedly? Second, treat friends, do you keep your word? Third, have you reviewed what the teacher taught you and followed it?

Four knowledge: heaven knows, earth knows, you know, I know.

Okay, I called you back. I hope I can help you.