One of the topics in ancient poetry is a pot of wine. A pot of wine is a winery. When I went to the hotel, I drank a little wine.

There was .875 dou in the hip flask. This problem is solved by backward calculation, that is, Li Bai drank 1 dou when he passed the last flower, so he still had .5 dou before passing the last shop, 1.5 dou before passing the second flower, and .75 dou before passing the second shop, so there was 1.75 dou before passing the first flower.