Lack of clothes and food, nothing, jokes.

There is a story in this couplet. It is said that when Emperor Qianlong visited the people, let's just say so. One winter, he met a family with couplets on the door. At first glance, Qianlong knew that his family was short of food and clothing. There is nothing at home. I sent someone to bring food and clothes to the family.

Our common number is 123456789 10. In this couplet, the upper couplet is missing 1, and the lower couplet is missing 10. So it's 1 (clothing) and 10 (food). Interrogate the north and the south. East, west, north and south. With north and south, there is nothing.