The last sentence of "Beware of candlelight" is "the sky is dry and the things are dry", which is often said by ancient people. Playing is a kind of night time system among the ancient people in China, from which came a kind of night watchman's profession. In ancient times, people lacked accurate means of telling time, and almost all of them played at night.

Apart from the catchphrase "dry weather and dry things, beware of candlelight", there are also these common catchphrases: guard against thieves, guard against theft, close doors and windows, sit in a row with GREAT GHOST children, pay attention to safety, ring gongs, close doors and windows, beware of candlelight and cold waves, turn off and close doors, go to bed early and get up early, and exercise. These slogans seem unremarkable, just reminding people of some things that should be paid attention to at night. In fact, these slogans are all learned. Different slogans generally correspond to different times, and people can roughly know what time it is when they hear different slogans.