What do you mean by my thirty years?

Case reference table. In the Tang Dynasty, Du Fu's poem "Ai Jiang Tou" said: I have been away from the case for 30 years, and I have not seen it at night. The author has been sitting at this table for thirty years, with no one at night and no sunshine during the day. It expresses the author's lonely mood and also reflects the life state of the literati at that time.