I didn't know the meaning of catering operators until I got to know them. For example, China Mobile and China Unicom are operators. You only need to buy a

phone card

and pay a

phone bill

every month, so you can enjoy the service. As for the hard work, dirty work and tired work such as building a machine station, customer service and signaling, the operators are doing it. This is the case with Dining Dimension

. You just need to find a professional to provide you with all kinds of services and pay the due fees, which is still unkind.