Lao Zhang is humorous and likes to sell words. One day, he went to a restaurant alone, and the waiter took a menu to order for him. After Lao Zhang wrote two side dishes on the menu, he added, "Two more and you'll drown." The waiter looked at the menu and said, "We only have brine chicken and boiled chicken here, and we have never sold a drowned rat!" "Lao Zhang said with a smile," how could it not be? If you don't even sell a drowned rat, what restaurant can it be? " The waiter scratched his head a few times and suddenly realized, repeatedly saying, "Comrade, wait a minute and bring it to you right away. "Readers, do you know what a' drowned rat' is? Answer: wine