2. Deferred collection or payment when buying or selling goods: credit purchase, credit purchase.
3. pictophonetic characters. From the bay, Yusheng. "Bi" was the word of fish in ancient times, so "fish" was used as the pronunciation.
4. During the Ming and Qing Dynasties, "credit" appeared in the sound of "she". See Lexicon Beibei), because "she" and "Yu" are similar, they are easily accepted by people, and soon replace the orthodox position of the word "Fu" (Orthography through Beibei: "On credit, customs follow." .