How to write a sign to leave temporarily? How to write the telephone number?

How to write the sign of temporary departure? How to write the telephone number? You can write it like this. If you need to leave temporarily, please dial the telephone number xxx.

Signs, as the name implies, are signs that indicate the direction, also called billboards and signboards, such as toilet signs and street signs.

Its definition is relatively broad. Hotel lobby sign, guide card, room number sign, information desk sign, cashier sign, parking plastic sign, parking lot sign, etc. Are examples of signs.