Salt water double spelling is named because of its meaning.

For example, pork tongue and dried tofu made a bittern double spell.

Pig's tongue, a Cantonese word for pigs, means to make a fortune and prosper. As for dried tofu, its square shape is like an official seal. In Chaozhou dialect, the homonym of "dry" and "official" was that in ancient times, "everything was inferior, only reading was high". Hard-working Chaoshan people eat dried beans, which means that they are diligent and enterprising, smart in reading, and poor students can leap into Longmen.