The Vietnamese word "phong bao" refers to a traditional practice of giving a gift of money, which is typically wrapped in a red envelope. This custom is especially common during special occasions, such as the Lunar New Year (Tết), weddings, or other celebrations. The act of giving "phong bao" symbolizes good luck and prosperity for the receiver, particularly children.
While "phong bao" primarily refers to the red envelope containing money, it can also mean a "package" or "envelope" in a more general sense in other contexts, especially in written communication.