Pass the business card first. All right! Let others know that you know you and are familiar with you first, so that business can proceed smoothly! And if you hand in your business card first, it will show that you are very polite and attach great importance to this conversation! Jewelry buyers are generally rich. They have a lot of face ~ you should know your customers better than I do! Think about it from another angle. If you don't know the name, job nature and other information of the person you are chatting with, your own subconscious mind will be alert to the other person and won't know more about it. How can business be concluded? You can ask each other this way during the debate. Hehe, I won the first place in the previous debate. You can ask me again if you have any questions. I hope it helps you! I wish you the first!