This couplet is a collection of sentences, the first couplet from Su Shi (Song) "send Lu Chang to know Jiazhou" interpretation: the poet found the reason of the bamboo crane.
The next couplet is taken from Su Shi (Song) "send an Dun Xiucai lost the west" interpretation: the book to the courtyard flowers and plants have no time to see
"Rare confused" is a way of life, refers to the face of all kinds of troubles in the world, sometimes might as well treat with a relaxed and tolerant attitude.