No one can see the essence of calligraphy, but the bamboo on the right army pool is clear. What does a poem mean?

Defengtang: This poem is complete as follows: "People see the fine calligraphy, and the bamboo on the right army pool is clear and full of cigarettes."

(Tian mentioned this poem in the calligraphy lecture episode 174: common sense of inscription (I), and thought that the source could not be tested. )

It is also said that it is from Zhang Dai's Night Boat, but it is not sure.

I hope my answer can help you.