20 rings. What's the joke in Spring Festival travel rush?

The twelfth ring of the Spring Festival is a popular word on the Internet. This term comes from the movie The Wandering Earth. It is a boring program written by the characters in the film (also known as Li Tiao), that is, the seven nozzles of the planetary engine spray twelve times in a specific order (to create the effect of setting off firecrackers in the Spring Festival). Later, Li Yiyi used this program to gain control of the No.3 steering gear in Sulawesi.