No matter what profession you are in, you must first be familiar with your major and the products you sell. Secondly, you must have a polite attitude and modest behavior. You must be generous and decent when outgoing. When you receive the other person's business card, use both hands to speak to the other person. Don't let your eyes wander around when you are walking, always put a smile on your face, don't point fingers when you talk, express your gratitude when you leave, bow slightly, and hope you work well.
If you agree with my point of view, please choose satisfied, thank you.