Li Bai's drinking problem has been solved in a logical sense.

I think I met three o'clock and three flowers, and all the wine was gone.

Now let's push back. When we saw flowers for the last time, we had to drink a bucket. As a result, there was 1 barrel of wine when we looked at the flowers, so he must have only half a barrel of wine before he went to the store, because when he met the store, he would spend 1 to go to a store, which is half a barrel. So if he meets flowers again, he will drink 1 barrel, which was before.

Then have a cup with flowers. It's 1 3/4 now, and it was 7/8 before entering the store.