What are the contents of library volunteer etiquette?

Receive "five tones" and "civilization cross" Library volunteers refer to those who do voluntary work in the library. The etiquette to be observed in the library is to receive the "five tones" and the "cross of civilization". Among them, the reception "five tones" means: customers enter the store with greetings, customers ask with replies, customers help with thanks, customers leave with apologies, and the civilized cross means: hello, please, thank you, sorry, goodbye.