Every poem and sentence of Jia Dao has been repeatedly tempered and carefully revised. But after he wrote it, the reader couldn't see the trace of revision at all, as if it were completely natural and in one go. It can be seen that the so-called bitter songs can only be said from the author's hard work. As for the aspects that readers appreciate, don't see the author's pain. Jia Dao's bitter spirit has a great influence on later generations.