Because many websites have blocked such indecent words as "sb (Chinese pronunciation)", people are used to typing lzsb directly in English. On the cat's flapping. Com, a netizen (probably sogou) typed the four letters LZSB, and directly came out with the word "Lanzhou baked wheat cake", which was published and became popular on the Internet. This is the origin.

Is that clear enough? Give me some, I need it urgently, thank you!